The RC-9000 is designed to be a remote control head for the TDFM-9000, 9200, and 9300 airborne transceivers. It is a secondary (slave) control point and is not intended to replace the function of the front panel of the radio. It uses an RS-232 protocol to communicate with the radio. The controller is standard Dzus mount and is 4.5 inches in height and 1.3 inches in depth. The weight is 16 oz. Backlighting is 28 VDC or 5 VAC (software controlled).