AR7000 User Guide
that have substantial conductive materials (e.g. larger gas engines, carbon fiber, pipes, etc.),
which can weaken the signal.
The AR7000 full range 7-channel receiver features DSM2™ technology and is compatible with
all Spektrum™ and JR® aircraft radios that support DSM2 technology including: JR12X, X9303,
Spektrum DX7, DX6i, DX5e and Module Systems.
Using servo tape, mount the remote receiver keeping the remote antennas at least 2 inches
away from the primary antenna. Ideally, the antennas will be oriented perpendicularly to each
other. In airplanes, we’ve found it best to mount the primary receiver in the center of the
fuselage on the servo tray and to mount the remote receiver to the side of the fuselage or in the
turtle deck.
Note: The AR7000 receiver is not compatible with the Spektrum DX6 parkflyer transmitter.
Features
• 7-channel full range receiver
• Patented MultiLink receiver technology
• Includes one internal and one remote receiver • SmartSafe™ failsafe system
• QuickConnect™ with Brownout Detection
• Flight Log compatible (optional)
Applications
Full range up to 7-channel aircraft including:
• All types and sizes of glow, gas and electric powered airplanes
• All types and sizes of no-powered gliders
• All types and sizes of glow, gas and electric powered helicopters
2. Power the receiver. Note that the LED on the receiver should be flashing, indicating that the
receiver is in bind mode and ready to be bound to the transmitter.
3. Move the sticks and switches on the transmitter to the desired failsafe positions (low throttle
and neutral control positions).
In helicopters, there is generally enough room on the servo tray to achieve the necessary
separation. If necessary a mount can be fashioned using clear plastic to mount the external
receiver.
Note: Not for use in airplanes that have full carbon fuselages. Not for use in airplanes that
have significant carbon or conductive structures.
Specifications:
Type: DSM2 Full Range receiver
Channels: 7
Modulation: DSM2
Dimensions: 0.996 in x 1.85 in x 0.622 in (25.3mm x 47mm x 15.8mm)
Weight: .49 oz (14 g)
Voltage range: 3.5 to 9.6V
Resolution: 1024
Compatibility: All DSM2 aircraft transmitters and module systems
Patented MultiLink™ Receiver Technology
The AR7000 incorporates dual receivers, offering the security of dual path RF redundancy. An
internal receiver is located on the main printed circuit board, while a second external receiver
is attached to the main board with a 6-inch extension. By locating these receivers in slightly
different locations in the aircraft, each receiver is exposed to its own RF environment, greatly
improving path diversity (the ability for the receiver to see the signal in all conditions).
Antenna Polarization
For optimum RF link performance it’s important that the antennas be mounted in an orientation
that allows for the best possible signal reception when the aircraft is in all possible attitudes and
positions. This is known as antenna polarization. The antennas should be oriented perpendicular
to each other; typically one vertical and one horizontal (see Receiver Installation). The remote
receiver’s antenna should be mounted in a position perpendicular at least 2 inches away from
the main receiver’s antenna using double-sided foam tape.
Receiver Installation
In gas and glow aircraft install the main receiver using the same method you would use to install
a conventional receiver in your aircraft. Typically, wrap the main receiver in protective foam and
fasten it in place using rubber bands or hook and loop straps.
Alternately, in electric airplanes or helicopters, it’s acceptable to use thick double-sided foam
tape to fasten the main receiver in place.
Mounting the remote receiver in a slightly different location, even just inches away from the
primary receiver, gives tremendous improvements in path diversity. Essentially, each receiver
sees a different RF environment and this is key to maintaining a solid RF link, even in aircraft
4. Follow the procedures of your specific transmitter to enter Bind Mode, the system will
Important- Y-Harnesses and Servo Extensions
When using Y-harness or servo extensions it’s important to use standard non-amplified
Y-harnesses and servo extensions as this can/will cause the servos to operate erratically or not
function at all. Amplified Y-harnesses were developed several years ago to boost the signal for
some older PCM systems and should not be used with Spektrum equipment. Note that when
converting existing models to Spektrum be certain that all amplfied Y-harnesses and or servo
extensions are replaced with conventional non-amplified versions.
Binding
The AR7000 receiver must be bound to the transmitter before it will operate. Binding is the
process of teaching the receiver the specific code of the transmitter so it will only connect to
that specific transmitter.
1.To bind an AR7000 to a DSM2 transmitter, insert the bind plug in the BATT/BIND port on the
receiver.
Note: To bind an aircraft with an electronic speed controller that powers the receiver through
the throttle channel (ESC/BEC), insert the bind plug into the BATT/BIND port in the
receiver and the throttle lead into the throttle (THRO) port. Proceed to Step #2.
connect within a few seconds. Once connected, the LED on the receiver will go solid
indicating the system is connected.
5. Remove the bind plug from the BATT/BIND port on the receiver before you power off the
transmitter and store it in a convenient place.
6. After you’ve set up your model, it’s important to rebind the system so the true low throttle
and neutral control surface positions are set.
IMPORTANT: Remove the bind plug to prevent the system from entering bind mode the next
time the power is turned on.
SmartSafe™ Failsafe
The AR7000 features SmartSafe failsafe. SmartSafe is ideal for most
types of aircraft. With SmartSafe, when signal is lost the throttle channel
only is driven to its preset failsafe position (normally low throttle) while all other
channels hold last command.
• Prevents unintentional electric motor response on start-up.
• Eliminates the possibility of over-driving servos on start-up by storing preset failsafe
positions.
• Establishes low-throttle failsafe and maintains last-commanded control surface position if
the RF signal is lost.
Receiver Power Only
• When the receiver only is turned on (no transmitter signal is present), the throttle channel has
no output, to avoid operating or arming the electronic speed control.
• All other channels are driven to their preset failsafe positions set during binding.
Note: Some analog servos may drift slightly during power-up even though no signal is present.
This is normal.
After Connection
• When the transmitter is turned on and after the receiver connects to the transmitter, normal
control of all channels occurs.
• After the system makes a connection, if loss of signal occurs SmartSafe drives the throttle
servo only to its preset failsafe position (low throttle) that was set during binding.
• All other channels hold their last commanded position. When the signal is regained, the
system immediately (less than 4ms) regains control.
Plugging in the Leads
Plug the servo leads into the appropriate servo ports in the receiver noting the polarity of the
servo connector.
Range Testing
Before each flying session and especially with a new model, it is important to perform a range
check. All Spektrum aircraft transmitters incorporate a range testing system which, when
activated, reduces the output power, allowing a range check.
30 paces (90 feet/28 meters)
1. With the model restrained on the ground, stand 30 paces (approx. 90 feet/28 meters) away
from the model.
2. Face the model with the transmitter in your normal flying position and place your
transmitter into range check mode.
3. You should have total control of the model with the button depressed at 30 paces (90
feet/28 meters).
4. If control issues exist, call the Product Support Team in the U.S. at 1-877-504-0233 for
further assistance. In the UK or Germany use one of the following addresses.
European Union: +
44 (0) 1279 641 097 (United Kingdom)
or email sales@horizonhobby.co.uk
+49 4121 46199 66 (Deutschland)
or email service@horizonhobby.de
Advanced Range Testing
For sophisticated models that have significant conductive material in them, the Advanced range
test using a flight log is recommended. The advanced range check will confirm that the internal
and remote receivers are operating optimally and that the installation (position of the receivers)
is optimized for the specific aircraft. This Advanced Range Check allows the RF performance of
each receiver to be evaluated and to optimize the locations of the remote receiver.
Advanced Range Test
1 P lug a Flight Log (SPM9540 - optional) into the Batt/Data port on the AR7000 and turn on
the system (Tx and Rx).
2. Advance the Flight Log until F-frame losses are displayed by pressing the button on the
Flight Log.
3. Have a helper hold your aircraft while observing the Flight Log data.
4. Standing 30 paces away from the model, face the model with the transmitter in your
normal flying position and put your transmitter into range test mode. This causes reduced
power output from the transmitter.
5. H
ave your helper position the model in various orientations (nose up, nose down, nose
toward the Tx, nose away from the Tx, etc.) while your helper watches the Flight Log noting
any correlation between the aircraft’s orientation and frame losses. Do this for 1 minute.
The timer on the transmitter can be used here.
Receiver Power System Requirements
Inadequate power systems that are unable to provide the necessary minimum voltage to the
receiver during flight have become the number one cause of in-flight failures. Some of the
power system components that affect the ability to properly deliver adequate power include
• Receiver battery pack (number of cells, capacity, cell type, state of charge)
• The ESC’s capability to deliver current to the receiver in electric aircraft
• The switch harness, battery leads, servo leads, regulators etc.
The AR7000 has a minimum operational voltage of 3.5 volts; it is highly recommended the
power system be tested per the guidelines below.
Recommended Power System Test Guidelines
If a questionable power system is being used (e.g. small or old battery, ESC that may not have
a BEC that will support high current draw, etc.), it is recommended that a voltmeter be used to
perform the following test.
Note: The Hangar 9 Digital Servo & Rx Current Meter (HAN172) or the Spektrum Flight Log
(SPM9540) are the perfect tools to perform the test below.
Plug the voltmeter into an open channel port in the receiver and with the system on, load the
control surfaces (apply pressure with your hand) while monitoring the voltage at the receiver.
The voltage should remain above 4.8 volts even when all servos are heavily loaded.
Note: The latest generations of Nickel-Metal Hydride batteries incorporate a new chemistry
mandated to be more environmentally friendly. These batteries when charged
with peak detection fast chargers have tendencies to false peak (not fully charge)
repeatedly. These include all brands of NiMH batteries. If using NiMH packs, be
especially cautious when charging, making absolutely sure that the battery is fully
charged. It is recommended to use a charger that can display total charge capacity.
Note the number of mAh put into a discharged pack to verify it has been charged to full
capacity.
QuickConnect With Brownout Detection
Your AR7000 features QuickConnect with Brownout Detection.
• Should an interruption of power occur (brownout), the system will reconnect immediately
when power is restored (QuickConnect).
• The LED on the receiver will flash slowly indicating a power interruption (brownout) has
occurred.
• Brownouts can be caused by an inadequate power supply (weak battery or regulator), a
loose connector, a bad switch, an inadequate BEC when using an electronic speed controller,
etc.
• Brownouts occur when the receiver voltage drops below 3.5 volts thus interrupting control
as the servos and receiver require a minimum of 3.5 volts to operate.
How QuickConnect™ With Brownout Detection Works
• When the receiver voltage drops below 3.5 volts the system drops out (ceases to operate).
• When power is restored the receiver immediately attempts to reconnect to the last two
frequencies that it was connected to.
• If the two frequencies are present (the transmitter was left on) the system reconnects
typically in about 4/100 of a second.
QuickConnect with Brownout Detection is designed to allow you to fly safely through most short
duration power interruptions, however, the root cause of these interruptions must be corrected
before the next flight to prevent catastrophic safety issues.
Note: If a brownout occurs in flight it is vital that the cause of the brownout be determined
and corrected.
Flight Log (SPM9540 Optional)
The Flight Log is compatible with the AR7000. The Flight Log displays overall RF link
performance as well as the individual internal and external receiver link data. Additionally it
displays receiver voltage.
Using the Flight Log
After a flight and before turning off the receiver or transmitter, plug the Flight Log into the Data
port on the AR7000. The screen will automatically display voltage e.g. 6v2= 6.2 volts.
Note: When the voltage reaches 4.8 volts or less, the screen will flash indicating low voltage.
Press the button to display the following information:
A - Antenna fades on the internal antenna
B – Not used
L – Antenna fades on the external antenna
R – Not used
F - Frame loss
H - Holds
Antenna fades—represents the loss of a bit of information on that specific antenna.
Typically it’s normal to have as many as 50 to 100 antenna fades during a flight. If any single
antenna experiences over 500 fades in a single flight, the antenna should be repositioned in the
aircraft to optimize the RF link.
Frame loss—represents simultaneous antenna fades on all attached receivers. If the RF link
is performing optimally, frame losses per flight should be less than 20. A hold occurs when 45
consecutive frame losses occur. This takes about one second. If a hold occurs during a flight, it’s
important to evaluate the system, moving the antennas to different locations and/or checking to
be sure the transmitter and receivers are all working correctly.
Note: A servo extension can be used to allow the Flight Log to be plugged in more
conveniently. On some models, the Flight Log can be plugged in, attached and left on
the model using double-sided tape. Mounting the Flight Log conveniently to the side
frame is common with helicopters.
ModelMatch
Some Spektrum and JR transmitters offer a patent pending feature called ModelMatch.
ModelMatch prevents the possibility of operating a model using the wrong model memory,
potentially preventing a crash. With ModelMatch each model memory has its own unique code
(GUID) and during the binding process the code is programmed into the receiver. Later, when the
system is turned on, the receiver will only connect to the transmitter if the corresponding model
memory is programmed on screen.
Note: If at any time you turn on the system and it fails to connect, check to be sure the
correct model memory is selected in the transmitter. Please note that the Spektrum
Aircraft Modules do not have ModelMatch.
Tips on Using Spektrum 2.4GHz
While your DSM equipped 2.4GHz system is intuitive to operate, functioning nearly identically to
72MHz systems, following are a few common questions from customers.
Q: Which do I turn on first, the transmitter or the receiver?
A: If the receiver is turned off first—all servos except for the throttle will be driven to their
preset failsafe positions set during binding. At this time the throttle channel doesn’t output a
pulse position preventing the arming of electronic speed controllers or in the case of an engine
powered aircraft the throttle servo remaining in its current position. When the transmitter is
then turned on the transmitter scans the 2.4GHz band and acquires two open channels. Then
the receiver that was previously bound to the transmitter scans the band and finds the GUID
(Globally Unique Identifier code) stored during binding. The system then connects and operates
normally.
If the transmitter is turned on first—the transmitter scans the 2.4GHz band and acquires two
open channels. When the receiver is then turned on for a short period (the time it takes to
connect) all servos except for the throttle are driven to their preset failsafe positions while the
throttle has no output pulse. The receiver scans the 2.4GHz band looking for the previously
stored GUID and when it locates the specific GUID code and confirms uncorrupted repeatable
packet information, the system connects and normal operation takes place. Typically this takes
2 to 6 seconds.
Q: Sometimes the system takes longer to connect and sometimes it doesn’t connect
at all?
A: In order for the system to connect (after the receiver is bound) the receiver must receive
a large number of consecutive uninterrupted perfect packets from the transmitter in order to
connect. This process is purposely critical of the environment ensuring that it’s safe to fly when
the system does connect. If the transmitter is too close to the receiver (less that 4 ft.) or if the
transmitter is located near metal objects (metal TX case, the bed of a truck, the top of a metal
work bench, etc.) connection will take longer and in some cases connection will not occur as
the system is receiving reflected 2.4GHz energy from itself and is interpreting this as unfriendly
noise. Moving the system away from metal objects or moving the transmitter away from the
receiver and powering the system again will cause a connection to occur. This only happens
during the initial connection. Once connected the system is locked in and should a loss of signal
occur (failsafe) the system connects immediately (4ms) when signal is regained.
Q: I’ve heard that the DSM system is less tolerant of low voltage. Is the correct?
Warranty Period
A: All DSM receivers have an operational voltage range of 3.5 to 9.6 volts. With most systems
this is not a problem as in fact most servos cease to operate at around 3.8 volts. When using
multiple high-current draw servos with a single or inadequate battery/power source, heavy
momentary loads can cause the voltage to dip below this 3.5-volt threshold thus causing the
entire system (servos and receiver) to brown out. When the voltage drops below the low voltage
threshold (3.5 volts), the DSM receiver must reboot (go through the startup process of scanning
the band and finding the transmitter) and this can take several seconds. Please read the receiver
power requirement section as this explains how to test for and prevent this occurrence.
Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the “Product”)
will be free from defects in materials and workmanship for a period of 1 year from the date of purchase by
the Purchaser.
Q: Sometimes my receiver loses its bind and won’t connect requiring rebinding. What
happens if the bind is lost in flight?
A: The receiver will never lose its bind unless it’s instructed to. It’s important to understand that
during the binding process the receiver not only learns the GUID (code) of the transmitter but the
transmitter learns and stores the type of receiver that it’s bound to. If the transmitter is placed
into bind mode, the transmitter looks for the binding protocol signal from a receiver. If no signal
is present, the transmitter no longer has the correct information to connect to a specific
receiver and in essence the transmitter has been “unbound” from the receiver. We’ve had
several DX7 customers that use transmitter stands or trays that unknowingly depress the
bind button and the system is then turned on losing the necessary information to allow the
connection to take place. We’ve also had DX7 customers that didn’t fully understand the range
test process and pushed the bind button before turning on the transmitter also causing the
system to “lose its bind.”
Limited Warranty
(a) This warranty is limited to the original Purchaser (“Purchaser”) and is not transferable. REPAIR
OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE
PURCHASER. This warranty covers only those Products purchased from an authorized Horizon dealer.
Third party transactions are not covered by this warranty. Proof of purchase is required for warranty claims.
Further, Horizon reserves the right to change or modify this warranty without notice and disclaims all other
warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED,
ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE
PRODUCT. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE
PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be that Horizon will, at its option, (i)
repair or (ii) replace, any Product determined by Horizon to be defective. In the event of a defect, these are
the Purchaser’s exclusive remedies. Horizon reserves the right to inspect any and all equipment involved
in a warranty claim. Repair or replacement decisions are at the sole discretion of Horizon. This warranty
does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence,
commercial use, or modification of or to any part of the Product. This warranty does not cover damage due
to improper installation, operation, maintenance, or attempted repair by anyone other than Horizon. Return
of any goods by Purchaser must be approved in writing by Horizon before shipment.
Damage Limits
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF
PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT,
WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY.
Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability
is asserted. As Horizon has no control over use, setup, final assembly, modification or misuse, no liability
shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the
user accepts all resulting liability.
If you as the Purchaser or user are not prepared to accept the liability associated with the use of this
Product, you are advised to return this Product immediately in new and unused condition to the place of
purchase.
Law: These Terms are governed by Illinois law (without regard to conflict of law principals).
Safety Precautions
This is a sophisticated hobby Product and not a toy. It must be operated with caution and common sense
and requires some basic mechanical ability. Failure to operate this Product in a safe and responsible
manner could result in injury or damage to the Product or other property. This Product is not intended
for use by children without direct adult supervision. The Product manual contains instructions for safety,
operation and maintenance. It is essential to read and follow all the instructions and warnings in the
manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or injury.
Questions, Assistance, and Repairs
Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly,
setup or use of the Product has been started, you must contact Horizon directly. This will enable Horizon to
better answer your questions and service you in the event that you may need any assistance. For questions
or assistance, please direct your email to productsupport@horizonhobby.com, or call 877.504.0233 toll
free to speak to the Product Support department.
Inspection or Repairs
If this Product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA).
Pack the Product securely using a shipping carton. Please note that original boxes may be included, but
are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that
provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise
until it arrives and is accepted at our facility. A Service Repair Request is available at www.horizonhobby.
com on the “Support” tab. If you do not have internet access, please include a letter with your complete
name, street address, email address and phone number where you can be reached during business days,
FCC Information
Declaration of Conformity
(in accordance with ISO/IEC 17050-1)
Warranty Inspection and Repairs
This device complies with part 15 of the FCC rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
To receive warranty service, you must include your original sales receipt verifying the proof-of-purchase
date. Provided warranty conditions have been met, your Product will be repaired or replaced free of charge.
Repair or replacement decisions are at the sole discretion of Horizon Hobby.
Caution: Changes or modifications not expressly approved by the party responsible for
your RMA number, a list of the included items, method of payment for any non-warranty expenses and a
brief summary of the problem. Your original sales receipt must also be included for warranty consideration.
Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.
Non-Warranty Repairs
Should your repair not be covered by warranty the repair will be completed and payment will be required
without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost.
By submitting the item for repair you are agreeing to payment of the repair without notification. Repair
estimates are available upon request. You must include this request with your repair. Non-warranty repair
estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight.
Please advise us of your preferred method of payment. Horizon accepts money orders and cashiers checks,
as well as Visa, MasterCard, American Express, and Discover cards. If you choose to pay by credit card,
please include your credit card number and expiration date. Any repair left unpaid or unclaimed after 90
days will be considered abandoned and will be disposed of accordingly. Please note: non-warranty repair is
only available on electronics and model engines.
Electronics and engines requiring inspection or repair should be shipped to the following address:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
All other Products requiring warranty inspection or repair should be shipped to the following address:
No. HH20081022
compliance could void the user’s authority to operate the equipment.
Product(s):
Spektrum AR7000 Receiver
This product contains a radio transmitter with wireless technology which has been tested and found
to be compliant with the applicable regulations governing a radio transmitter in the 2.400GHz to
2.4835GHz frequency range.
Item Number(s):
SPM6070
Equipment class:
1
Instructions for Disposal of WEEE by Users in the
European Union
This product must not be disposed of with other waste. Instead, it is the user’s responsibility
to dispose of their waste equipment by handing it over to a designated collection point for the
recycling of waste electrical and electronic equipment. The separate collection and recycling of your
waste equipment at the time of disposal will help to conserve natural resources and ensure that it is
recycled in a manner that protects human health and the environment. For more information about
where you can drop off your waste equipment for recycling, please contact your local city office,
your household waste disposal service or where you purchased the product.
The objects of declaration described above are in conformity with the requirements of the
specifications listed below, following the provisions of the European R&TTE directive 1999/5/EC:
EN 300-328 v1.7.1ERM requirements for wideband transmission systems
operating in the 2.4 GHz ISM band
EN 301 489-1 v.1.6.1
General EMC requirements for Radio equipment
EN 301 489-17 v.1.2.1
Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822
Please call 877-504-0233 or e-mail us at productsupport@horizonhobby.com with any questions or
concerns regarding this product or warranty.
European Union:
Electronics and engines requiring inspection or repair should be shipped to one of the following addresses:
Signed for and on behalf of:
Horizon Hobby, Inc.
Champaign, IL USA
Oct 22, 2008
Horizon Hobby UK
Units 1-4 Ployters Rd
Staple Tye, Harlow
Essex CM18 7NS
United Kingdom
Steven A. Hall
Vice President
International Operations and Risk Management
Horizon Hobby, Inc.
Please call +44 (0) 1279 641 097 or email sales@horizonhobby.co.uk with any questions or concerns
regarding this product or warranty.
Horizon Technischer Service
Hamburger Str. 10
25335 Elmshorn
Germany
Please call +49 4121 46199 66 or email service@horizonhobby.de with any questions or concerns
regarding this product or warranty.
US patent number 7,391,320. Other patents pending.
DSM and DSM2 are trademarks or registered trademarks of Horizon Hobby, Inc. The Spektrum trademark is used
with permission of Bachmann Industries, Inc. Spektrum radios and accessories are exclusively available from Horizon
Hobby, Inc.
Revised 10/08
10654.4