Radiolink 2.4Ghz R6F 6 Channels RC Receiver Long Distance Control for Car/Boat Surface Remote Controller RC6GS V2/RC4GS V2/RC4GSPlease note: 1. R6F rc receiver suitable for Radiolinks transmitter RC4GS RC4GS V2 RC4GS V3 RC6GS RC6GS V2RC6GS V3 RC4G RC8X T8FB T8S. How to Match Code With Transmitter: 1. Put the transmitter and the receiver close to each other within 50 cm. 2. Turn on the transmitter, then power on the R6F. 3. There is a black button on the R6F, long press the button press 1 seconds and release, receiver light start blinking, match code success then receiver