This is the Futaba R603FF 2.4GHz FASST 3-channel receiver. It is used in the 2.4GHz 3PM Pistol Grip Radio.
Includes: Futaba R603FF 2.4GHz FASST 3-Channel Receiver
Requires: Futaba 3PM Computer Radio with the 2.4GHz FASST System
Reception Antenna: External
Power Requirement: 6V NiCd battery
Size: 1.5x1x0.55 (39x26x14mm)
Weight: 0.45oz (12.8g)
Antenna Length: 7-1/2