The PetSafe Deluxe Ultralight Dog Fence Collar is one of the smallest and lightest receivers available and offers FIVE LEVELS OF CORRECTION. This dog fence collar is appropriate for all pets five pounds and up. You can program the PetSafe Deluxe Ultralight Collar to exactly the proper correction level for you pet so it can be used with a pet;with any temperament. Level one is a warning tone only with no correction. This is ideal for initial training or very timid dogs. Level five is almost as strong as the PetSafe Stubborn Dog Collar. The PetSafe Deluxe Ultralight Dog Fence Collar also has a low battery indicator light to let you know when the batteries need replacing. Features Progressive Correction - if your dog attempts to run through, the correction level increases until he turns back. If you want one the smallest receiver on the market, yet have the ability to use it with any pet, big or small, timid or stubborn, the PetSafe Deluxe Ultralight Dog Fence Collar is your best choice. Compatible with all PetSafe, Radio Fence and Pet Guardian Brand In-Ground Pet Fences EXCEPT UltraSmart Rechargeable In-Ground Fence (PIG00-13619) and YardMax Rechargeable In-Ground Fence (PIG00-11115). Not compatible with Invisible Fence or PetSafe Wireless Dog Fences. This incredibly lightweight and versatile collar comes complete with collar, battery, a pair of short probes for short-hair dogs and long probes for long-hair dogs. The Deluxe UltraLight collar weighs only 2.5 ounces, so your dog or cat will barely know it's there. Not compatible with Invisible Fence Pet Fences or PetSafe Wireless Dog Fence