FrSky

FrSky TFR4 4ch 2.4Ghz Surface/Air Receiver FASST Compatible Compatibility:FASST 2.4G: Air Systems (7CH Mode/Multi Mode) & Surface Systems (C1 Mode) (3PK 4PK/4PKS etc.) FrSky TF Modules: TF-8M, TF-14MFeatures:Compatible with FASST 2.4G: Air Systems (7CH Mode/Multi Mode) & Surface Systems (C1 Mode);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);Light weight and small size;Two selectable failsafe setting options.Specifications:Number of Channels: 4Operating Voltage Range: 3.5V~10VOperating Temperature Range: -10C~80CDimension: 34*19*8mmWeight: 6.2g