These are the instructions to Pair a Tri Tronics "XLS" Collar to the transmitter. NOTE:  This Instructions will not work for the G2, or G3 EXP systems.   The XLS system is one that does not use Cradle chargers and can easily be identified as you have to plug in the connector directly to the collar to charge the unit.   Turn the collar off. plug the charger into the collar, you will hear a beep. as soon as you hear the beep, turn the collar on and will hear another beep. as soon as you hear that beep, hit the continuous button on the transmitter this happens in a quick succession and your collar will be added.