Tri-Tronics Turn On Plug
Tri-tronics Turn On Plugs are required to activate many older Tri-Tronics collars. The Turn on plug is absolutely essential to the operation of all older Tri-Tronics traininig collars and the 150 System. Having a spare or two is always a good idea.
The hooded design prevents dislodging. (Not needed for the new series Remote Trainers.)