This is the 3-Channel Futaba 3PRKA 2.4GHz FHSS Radio System with the R203GF Receiver. FEATURES Ideal upgrade for radios found in RTR vehicles Throttle and steering trim and reverse Steering dual rate dial Throttle end point adjustment Channel three switch Throttle fail safe INCLUDES Futaba 3PRKA 2.4GHz FHSS Transmitter, R203GF Receiver, Instruction Manual and On/Off Switch REQUIREMENTS Servos of modeler's choice Four AA batteries for transmitter SPECIFICATIONS Transmitter: Transmitting Frequency: 2.4GHz band Power Requirement: Four AA cells Current Drain: 100mA or less Receiver; Dimensions: 1.54 x 1.02 x 0.39" (39 x 26 x 10mm) Weight: 0.28oz (8g) Operating Voltage: 4.8 - 7.4V (shared with servo) Battery Fail Safe Voltage: 3.8V* Current Drain: 30mA at no signal