SportDOG Replacement Transmitter for In-Ground Fence SDF-100A Containment Systems The upper and lower dishes

The upper and lower dishes provide two drinking areas for pets

When your pet enters the Barrier Area

and can quickly convert to a regular collar

Collapses into a size smaller than a briefcase

Add an unlimited number of pets to your YardMax in-ground system with this extra receiver collar

SportDOG Replacement Transmitter for In-Ground Fence SDF-100A Containment Systems The upper and lower dishesThe transmitter is powerful enough to cover up to 100 acres of land. Add an unlimited number of dogs with the purchase of additional Add A Dog Collar Receivers. Features: Wire Break Transmitter alarm alerts you to possible problems with boundary wire Built In Lightning Protection Only compatible with the SDF 100A