Underground Fence - PetSafe Stubborn Dog Collar with 2 Free Batteries Compatible with PetSafe in-ground fences except UltraSmart In-Ground Fence PIG00-13619 and YardMax Fence PIG00-11115 4 adjustable levels of static correction, plus tone with vibration only option with push of a button Also compatible with the Indoor Pet Barrier Transmitter (PIRF-100) to protect your pet indoors Comes with short and Long probes and Test Tool 2 FREE BATTERIES