The Flysky FGr4B is a 4-channel 2.4GHz receiver built on the AFHDS3 protocol, designed for use with compatible Flysky transmitters. It operates on a supply voltage of 3.5 to 9V DC and includes a bind button for pairing. The receiver features a set of servo output pins and supports PPX6 signal output, making it suitable for RC cars, boats, aircraft, and helicopters running the AFHDS3 protocol. FCC certified under ID N4ZFGR4B000. Features: 4-channel AFHDS3 2.4GHz protocol 3.5 to 9V DC operating voltage Dedicated bind button PPX6 signal output support FCC certified 7/7/26 cs