This is the Futaba 3PRKA 2.4GHz FHSS 3-Channel Radio System with a R203GF Receiver included.Features: Throttle and steering trim and reverse Throttle end point adjustment Throttle fail safe Ideal upgrade for radios found in RTR vehicles Steering dual rate dial Channel three switch One year limited warranty (through Hobby Services) beginning at date of purchase Includes: One Futaba 3PRKA 2.4GHz FHSS Transmitter, R203GF Receiver, Instruction Manual and an On/Off SwitchRequires: Servos of modeler's choiceFour AA batteries (for transmitter)Note: The 2.4GHz FHSS is not compatible with FASST systems, and the R203GF receiver is compatible only with electronics created specifically for 2.4GHz FHSS systems Specs: TransmitterTransmitting Frequency: 2.4GHz bandPower Requirement: Four AA cellsCurrent Drain: 100mA or lessReceiverDimensions: 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: 3.8VCurrent Drain: 30mA at no signalNote: Battery fail safe voltage is set for 4-cell NiCd/NiMH battery. Battery F/S does not work properly when other type of battery is used