1. Pairing Key: Press this key for more than 1 second, the remote will enter pairing modeand and LED will flash. Release this key to stop pairing .Afte the pairing is successful, LED will stop flashing. 2. LED :In unlocked state, the remote can control actuators normally and LED will on when youpress any button. In locked state, LED will flash when you press any button which indicatesthe remote is locked. 3. Child lock Press and hold the HEAD UP & HEAD DOWN and the LED will flash by 1Hz at the same time After 5 times flash, the LED will turn off and the remote will enter into locked mode.Press the FOOT UP & FOOT DOWN , the LED will flash by 1Hz. After 5 times flash, the LED will turn off and the remote will enter into normal mode.