FS2A 4CH AFHDS 2A Mini Compatible PWM Receiver for Flysky I6 I6X I6S1 Transmitter. Press and hold the key on the receiver and connect power to the receiver. The blue light on the receiver flashes, get into binding mode.2. Set the transmitter to binding mode (confirmed after protocol 2A). When you enter binding mode, the receiver light changes from flashing to slow flashing.3. The transmitter exits binding mode, and then the receiver's blue light becomes bright. Indicates that the received signal was successful. Failsafe settings: The receiver can receive the transmitter signal normally, move the rocker to the emergency kit, long press the receiver bind button, the blue light flashes quickly several times, then it is always bright. The failsafe settings are successful. Size: 11*25*3mm Color: BlackMaterial: PCBFow Content:1*FS2A 4CH AFHDS 2A Mini Compatible Receiver1*PartsOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.