Vex # 276-2153. Transmitter and receiver for remote control of robotics servos. Designed as an add-on kit to allow two human operators to control different aspects of the same robot, it can also be used as the primary control (see note below). 6 channels (4 analog and 2 digital). Two joysticks, each with an X and Y axis, control the analog channels 1-4. Momentary switches on the front and back operate the two digital channels. Operates on Channel 89 (75.970MHz). Includes transmitter and receiver with crystals for Channel 89, receiver antenna and sleeve holder for antenna and interconnect cable between RF receiver module and microcontroller. Transmitter operates on eight AA batteries or one 9.6V battery pack. Batteries not included.

Note: To use this transmitter as a primary control, it is necessary to use a micro controller module to split and amplify the received signal into six individual channels. See PDF spec sheet (linked below) for a schematic for this modification / addition, provided by one of our customers.