FrSky TFR4 2.4G 4CH Surface\/Air System FASST Compatible Receiver CPPM RSSI OutputDescription:Brand Name: FrskyItem Name: TFR4Frequency: 2.4GHzNumber of Channels: 4Operating Voltage Range: 3.5V~10VOperating Temperature Range: -10C~80CDimension: 34*19*8mmWeight: 6.2gCompatibility:FASST 2.4G:Air Systems (7CH Mode\/Multi Mode): 6EX、 7C、 TM-7、 TM-8、 T8FG、 T10C、 TM-10、 T10CG、 T12Z、 T12FG、 TM-14、 T14MZ、 etc.Surface Systems (C1 Mode): 3PK 4PK\/4PKS etc.Features:CPPM and RSSI (PWM) output - If CH3 and CH4 are connected by a jumper、 CH1 will output CPPM for CH1~CH8、 and CH2 will output RSSI (PWM)Lighter weight and physically smallerTwo selectable failsafe setting options (use native failsafe on radio side or set failsafe on TFR4 side)English Manual、please Click HerePackage Included:1x FrSky TFR4 receiver