We need to connect the collar with the remote. If you have a second dog you'll need to pair the remote with the second collar. First, turn the collar off. Press and hold the on/off button on the collar. The LED light will turn on, then off. Release the on/off button with either dog 1 or 2 selected on the remote. Dog 1 is selected if you are reconnecting the collar. Dog 2 is selected if you are pairing the remote with the second collar. Press and hold the blue action button until the collar light flashes 5 times. Pairing is now complete and ready to use..