Keep your pet out of areas of your home that you designate. Keeps pets out of areas of the house, such as a nursery or kitchen or away from trashcans, etc. Unit transmits a radio signal up to 20 feet. Can transmit through walls or floors. Works with any PetSafe In-Ground and Underground Radio Fence Receiver Collar. Receiver Collars will administer a Static Correction inside the signal area. Lifetime Limited Warranty.