To buy, sell or trade in this product click on the link below: http://www.avionteq.com/Heatcon-HCS9200B-Single-Dual-Zone-Hot-bonder-Composite-Bonding-Repair-System.aspx www.avionteq.com HCS9200A and HCS9200B FAQ Q. What is the main difference between HCS9200A & HCS9200B? A. The HCS9200A differs from the 9200B mainly in the software user interface. The B has a faster processor, greater screen resolution but mostly it differs in cure program options. Outwardly, the only way to tell the difference is that the A has a serial data port on the back of the screen bezel where the B has a USB port and a Network Controller Data Jack.