Please note: 1.R6F rc receiver suitable for Radiolink’s 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 signal LED always on.R6F Receiver Specifications:Channel: 6Model: Cars/boatsControl Distance: more than 400mSpread Spectrum: FHSSAntenna Length: 200mmWork Current: 30mAPower Supply: 3.0-15V DCRF Power: <10dbmChannel Resolution: 4096Size: 1.37*0.79*0.51inWeight: 6gPackage Included: R6F Receiver x 1