FrSky TFR4B 2.4Ghz 4CH Surface/Air receiver

Light weight and compact in size, the TFR4B is a great choice for both surface and air applications. Its FASST compatibility makes it an excellent value for users running 3PK/4PK/4PKS surface systems, and also for those using FASST 2.4G air systems.
Compatibility:
FASST 2.4G: Air Systems (7CH Mode/Multi Mode) & Surface Systems (C1 Mode) (3PK 4PK/4PKS etc.)
FrSky TF Modules: TF-8M, TF-14M
Features:
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: 4
Operating Voltage Range: 3.5V~10V
Operating Temperature Range: -10~80 degree Celsius
Dimension: 42x19x7mm
Weight: 5.0g