Please note that this receiver is an estate sale item and being sold as-is and untested, making it essential for the buyer to carefully assess its condition before use. I was able to open the battery compartment and note that it was clean with no corrosion. The battery tested dead and I don't have another of that specific battery, so I was unable to test it further. Sold as-is with no return option. The PetSafe RF-275 Stubborn Dog In-Ground Fence Receiver N13506 is designed for dogs weighing 8 pounds or more. This in-ground fence receiver is specifically for stubborn dogs, providing a reliable method to contain them within a specified area. The brand is PetSafe, known for quality pet products, and the model number is RF-275. Thanks for looking.