Multi Channel Receiver R6FA SB
https://www.rc-corona.com/
All the receivers we have are multi-channel, like 4CH, 6CH,7CH,8CH,14CH. Every channel has its own feature. For example, The 4 channels means that there are 4 channels on the remote that control the motion of the helicopter. Instead, small servos(motors) are used to control the angle of the helicopter's bottom rotors. Tilting the rotors forward and backwards creates the forward and backwards motions.