Works only with PetSafe In Ground Fence Containment System as a replacement collar or to add a new dog. Offers 5 adjustable levels of correction, as well as a beep-only warning mode. Run-through protection reminds your pet to return to the approved area. Collar and receiver weigh only 2.5 ounces, making them a comfortable fit. The waterproof receiver includes a light that signifies low battery life. Ideal for dogs over 15 pounds. Also includes PetSafe RFA-67 battery module.