User Manual
Microphone Mini
Microphone Mini DM-05
User Manual
Table of Contents
Introduction to the Comfort Digisystem
Presenting the Microphone Mini DM-05
Functions of the Microphone Mini DM-05
Getting Started
First Time Use
More Functions
Radio Range and Channels
Attached Accessories
Other original Accessories
Trouble Shooting
Service and Warranty
Technical Data
Important Safety Instructions
Microphone Mini DM-05
Introduction to the Comfort Digisystem
Thank you for choosing Comfort Digisystem.
The products are easy to use, whether you use a hearing
aid or not.
Before using the product, please read this User Manual
Using the Microphone Mini DM-05 transmitter, the signal
is transferred digitally, resulting in an excellent clear
Comfort Digisystem is fitted with
Technology - a type of digital technology allowing eavesdrop-secure radio transfer in real time.
Presenting the Microphone Mini DM-05
The Microphone Mini DM-05 is the world's smallest wireless microphone for the digital transfer of sound to earpieces. This radio signal is encoded so that no one else
can hear what is being said. The microphone is extremely
discreet and can be simply attached to clothes with a clip.
The Microphone Mini DM-05 is equipped with a voice AGC
(Automatic Gain Control) to maintain a comfortable sound
level at all times.
The DM-05 is pre-programmed with 10 channels.
Additional channels can be used in combination with
other Digisystem products.
Microphone Mini DM-05
Functions of the Microphone Mini DM-05
Charging socket
On / Off
Hole to secure neck
Pairing button
Function indicator
Microphone Mini DM-05
Getting Started
The Microphone Mini DM-05 is chargeable. Charge the
DM-05 at least two hours before you use it for the first
time. An empty battery is fully charged within two hours.
During charging, the function indicator shows red.
Once the function indicator shows green the unit is fully
charged and switches to automatic float charging. The
unit is automatically switched off when charging.
A fully charged battery has an operating time of up to six
hours. Battery lifetime is up to five years. You must not
change the battery yourself; please contact your point of
Connecting a charger to the
Microphone Mini DM-05
Please note:
Only use the charger
supplied by Comfort Audio AB.
Microphone Mini DM-05
First Time Use
Switch on the transmitter by pressing the On/Off button
for around two seconds. Function indicator ON.
The Microphone Mini DM-05 s a microphone for closer
range. It works best within approx. 30 cm.
Attach the DM-05 to your clothes using the clip. The
DM-05 is supplied with a neck pendant, which can be
connected to the unit to make sure that you do not drop it.
Other functions are explained later in this manual.
Microphone Mini DM-05
As the DM-05 does not have a display/menu, the unit's
functions are controlled by means of the pairing button.
The current function is displayed by the function indicator.
In addition to the pairing functions (see section Pairing),
there is also the facility to activate three modes. To do
this, press the pairing button and hold it down immediately after starting up the unit (within two seconds). A
selected mode can always be cancelled by switching off
the DM-05 and starting it up again.
0 sec
5 sec
10 sec
15 sec
20 sec
Change channel
When the pairing button is held down for five seconds,
the function indicator shows a constant green light. If you
release the pairing button when the function indicator is
green, the Change channel mode is activated. Press the
pairing button briefly the number of times corresponding
to the desired channel (1-10), see section Radio Range
and Channels. After a pause of two seconds, the entry
process ends and the selected channel is shown by the
same number of green flashes in the function indicator.
Change code
If the pairing button is instead held down for ten seconds,
the function indicator will switch to a red light. If you
release the pairing button when the function indicator
is red, Change code mode is activated. Press the pairing
button twice in quick succession to generate a random
Microphone Mini DM-05
code, and at the same time the pairing information is
transmitted (make sure that other Digisystem units to be
paired are activated to receive pairing information). Five
red flashes in the function indicator confirm that the pairing information (channel and code) has been sent.
Factory reset
If the pairing button is instead held down for 20 seconds,
the function indicator will switch to an alternating red
and green light. The Factory reset mode is now activated.
To perform a factory reset, press the pairing button once
quickly. The function indicator flashes the number of
times corresponding to the channel, see section Radio
Range and Channels. The channel and code are now
reset to the factory settings.
In contrast to other Comfort Digisystem transmitters, the
Microphone Mini DM-05 does not have a display and must
therefore be paired using the pairing button, see section
Pairing (via pairing button).
To use a receiver and transmitter together, they must be
paired. All transmitters and receivers are default paired
at the factory and will work together. To prevent eavesdropping, a new code key must be generated and transmitted between the units by pairing.
Transmitting/receiving of pairing information along with a
new code can be performed from any Comfort Digisystem
unit. To pair units without a display, see sections Pairing
(via pairing button) and Pairing (Connector DT-10). Pairing information or a new code key can be received by a
several activated units.
Comfort Digisystem units with both transmitters and
Microphone Mini DM-05
receivers built-in can be paired separately. When opening
the pairing menu, choose the concerning unit (transmitter/receiver). In units with both transmitters and receivers, the pairing button controls the transmitter. The code
key is always the same for the transmitter and the receiver when these are built-in in the same unit. The easiest way to get the same code key in the whole Digisystem,
is to generate a new code key from the combined unit; in
that way the built-in receiver gets the same code as the
rest of the system.
Pairing (via menu)
Select Receive info on one unit. Ready to receive pairing info is shown in the display. Select New code on the
other unit; select Yes. Generate new code and send info?
is shown in the display. Select Yes (Now both the channel
and the coding information have been sent, and sound
transfer is eavesdrop-secure). To pair another unit into
your coded system, select Send info instead on one of
your paired units.
Pairing (via pairing button)
(The only way of pairing units without a display, with the
pairing button)
Two brief presses activate the Send info button.
One long press activates the Receive info button.
You can also go straight to the Pairing menu item via the
pairing button. One brief press opens the Pairing menu
on items with a display.
Pairing (Connector DT-10)
The connector cannot send information, only receive
it. To activate the position Receive info, the connector
must be in operation (position I or II) and connected to an
operating hearing aid. The selector is then quickly moved
to position 0 and back to the operating position (I or II).
The connector can now receive pairing info. If no info is
Microphone Mini DM-05
received by the connector, after a short time this returns
automatically to the previous setting.
Microphone Mini DM-05
More Functions
Function indicator (LED)
The function indicator shows the unit's status depending
on its setting.
When the DM-05 starts, the function indicator shows
which channel is selected (1-10) by flashing green 1-10
times. If another channel has been paired in, this is
indicated by the green lamp lighting for four seconds
when the unit is started up.
On normal operation the indicator flashes every other
During charging the indicator shows red.
When the charging is completed, the indicator shows
When the battery gets low, the indicator flashes red every
other second.
Once the unit has been set to receive pairing information,
the indicator flashes green quickly.
When receiving pairing information, the indicator shows
green for four seconds.
When sending pairing information, the indicator flashes
red five times.
A constant green light indicates Change channel mode.
A constant red light indicates Change code mode.
An alternating red/green light indicates Factory reset
Microphone Mini DM-05
Radio Range and Channels
The transmitter and receiver have built-in antennas. The
radio range between the units is around 30 metres. This
may however vary depending on the particular environment you are in. Like all radio systems, Comfort Digisystem communicates on specific channels. If you use two
transmitters on the same channel or a neighbouring one,
there may be interference. Other electronic equipment
can also interfere with radio transmissions.
In most European countries, channels 1-3 (863.250 864.750 MHz) may be used for hearing products. However, you should always check with the frequency assignment authority in your own country which channels are
free and which require a licence.
Frequency range of each model
Art. no. DG15101 (F2)
768 - 818 MHz
Pre-programmed channels
1. A53 - 768.800 MHz
2. A46 - 771.600 MHz
3. A35 - 776.000 MHz
4. A25 - 780.000 MHz*
5. A15 - 784.000 MHz
6. C25 - 790.400 MHz
7. C12 - 795.600 MHz
8. D45 - 802.000 MHz
9. D34 - 806.400 MHz
10.D15 - 814.000 MHz
* Factory-set channel
Microphone Mini DM-05
Art. no. DG15001 (F1)
818 - 872 MHz
Pre-programmed channels
1. 1 -
2. 2 -
3. 3 -
4. E85 -
5. E71 -
6. E42 -
7. E19 -
8. E4 -
9. B15 -
10.B4 -
863.250 MHz
864.000 MHz*
864.750 MHz
820.000 MHz
825.600 MHz
837.200 MHz
846.400 MHz
852.400 MHz
857.200 MHz
861.600 MHz
* Factory-set channel
In addition to these selectable channels, channels within
the frequency range of each DM-05 model can be set by
means of pairing with other Digisystem units.
Microphone Mini DM-05
Attached Accessories
Safety neck pendant
Other original Accessories
Car charger
The car charger is designed for cars with a 12 volt (-)
earthed electrical system. The charger has short-circuit
and automatic overload protection. Disconnect the charger from the socket after use.
Charging stand
For other accessories, please visit our website,
Microphone Mini DM-05
The transmitter and receiver do not start
Charge the transmitter and receiver. Remember to press
the On/Off button down for 2 seconds to switch the unit on.
Check that the charger is connected to the plug socket.
Poor speech intelligibility
The distance between the transmitter and the receiver
may be too long. The range is around 30 metres. The
distance between the microphone and the person who
is talking may also be too long; move the microphone
nearer to the person talking. Try to change channel/environment.
Poor range and interference
In some environments involving, e.g., concrete, iron or
sheet metal structures, the range may be reduced. There
may also be equipment nearby causing interference.
Change channel.
No sound
Check that the transmitter and receiver are set to the
same channel.
Loud hissing noise (no sound transfer)
Check that the units are paired.
Microphone Mini DM-05
Service and Warranty
Comfort Audio AB provides a comprehensive warranty
for two years as from the date of delivery. This covers all
defects of manufacture and materials. Defects caused by
careless handling or intervention inside the product or its
accessories are not covered by the warranty.
Under normal use, battery lifetime is up to five years.
Contact your point of purchase once it is time to change
the battery.
You are always welcome to contact us at Comfort Audio if
you have any questions.
Technical Data
Type of transmitter:
Weight: Frequency range: Antenna: Operating time:
Charging time:
Microphone: SST - SecureStream Technology
Approx. 30 m
58 x 27 x 14 mm incl. clip
16 g
DG15101 (F2) 768 - 818 MHz
DG15001 (F1) 818 - 872 MHz
Up to six hours
Chargeable Li-Polymer
Approx. two hours
Built-in, omnidirectional
Microphone Mini DM-05
Important Safety Instructions Read these before using your product
1) Read these instructions.
2) Keep these instructions.
3) Heed all warnings.
4) FolIow all instructions.
5) Do not use this apparatus near water.
6) Clean only with dry cloth.
7) Do not use near any heat sources such as radiators
heat registers stoves, or other apparatus (including
amplifiers) that produce heat.
8) Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades
with one wider than the other. A grounding type plug
has two blades and a third grounding prong. The wide
blade or the third prong are provided for your safety.
If the provided plug does not fit into your outlet
consult an electrician for replacement of the obsolete
outlet. (Only when using polarized plug)
9) Protect the power cord from being walked on or
pinched particularly at plugs convenience
receptacles. and the point where they exit from the
10) Only use attachments/accessories specified by
Comfort Audio AB.
11) Unplug this apparatus during Iightning storms or
when unused for long periods of time.
12) Refer all servicing to qualified service personnel.
Servicing is required when the apparatus has been
damaged in any way such as power-supply cord or
plug is damaged Iiquid has been spilled or objects
have fallen into the apparatus, the apparatus has
been exposed to rain or moisture does not operate
normally or has been dropped.
13) Start listening at a low volume.
14) Too high a volume can seriously damage your
Microphone Mini DM-05
15) Don’t dissasemble the product.
16) Should the product break open because of damage,
service should only be done by qualified service
17) Never use a transmitter or receiver set to a
non-permitted frequency. Check with the frequency
authority in the country where the equipment is to be
18) The product contains sensitive electronic equipment
and must be handled carefully.
19) Never charge product in closed, unaired spaces such
as handbags, cases or other closed storage bags.
20) Only use batteries and power supply specified by
Comfort Audio AB.
21) You must not change the battery yourself; please
contact your point of purchase.
22) CAUTION! Danger of explosion if battery is incorrectly
23) The product shall not be exposed to excessive heat
such as sunshine, fire or the like.
Subject to change
Microphone Mini DM-05
Microphone Mini DM-05
Comfort Audio AB
Box 154, SE-301 05 Halmstad, Sweden
Tel. +46 (0)35 15 23 00 Fax +46 (0)35 15 23 23
Microphone Mini DM-05
MA0158 Ver 1.1 Rev A
Manufactured by: