Please follow the instructions to activate the shock settings 1. Turn on the remote control and turn off the receiver 2. Press and hold the power off button of the receiver for at least 5 seconds. Then you will hear a beep and then the red LED flashes. (You will have 5 seconds to pair your device.) 3. Press the vibration button for 5 seconds to complete pairing and you will hear a beep. 4.You can set the shock level from 1 to 100. We recommend checking the shock level on your hand.