A battery pack for Alpha T 20 and TT 25 dog collars that adds an audible beeper to the collar. Power and sound come from one unit, so there is no second device to strap on, and the beeper carries in cover where a handheld screen alone is not enough to work a dog.
It installs on the collar in place of the standard battery pack and is the genuine Garmin part for the Alpha collar system.
