The PetSafe® Rechargeable In-Ground Fence Add-A-Dog® Receiver Collar is a lightweight, waterproof receiver collar. The collar has 4 levels of static correction and tone-only mode to customize to your pet's personality. Works with PetSafe® In-Ground Fence™ systems except YardMax® and UltraSmart® systems. This collar is compatible with the following PetSafe In-Ground Fence systems: PIG00-14673, PIG00-13661, PIG00-10777, PIG20-11041, PCF-1000-20 and PIG00-14582. Not compatible with PetSafe Wireless, PetSafe UltraSmart®, PetSafe YardMax ® or Innotek® systems. Features Great for dogs 5 lb and up Small, light receiver collar is comfortable for your pet to wear Purchase additional collars for every dog in your family 4 levels of static correction plus a tone-only mode Collar strap adjusts to fit neck sizes 6-26 in Waterproof receiver collar Built-in rechargeable battery quickly recharges in 2-3 hours Compatible with your existing: Basic In-Ground Fence™ Rechargeable In-Ground Fence™ Stubborn Dog In-Ground Fence™ In-Ground Fence™ Elite Little Dog In-Ground Fence™ In-Ground Cat Fence™ In-Ground Fence™ - Refurbished Stubborn Dog In-Ground Fence™ - Refurbished Indoor Radio Fence® Our static collars are part of our ongoing mission to provide the best tools, education and support for pet parents seeking safe, effective, expert-recommended options they can trust to meet each dog’s unique training needs