KF-504 Wireless Remote Key Finder Locator with 4 Receivers --Remote Control, Pet, Wallet, Key Finder, etc. The Remote finder is used for locating missing objects Attach the receiver to any items such as a remote, car keys etc. press the corresponding A, B, C, D button for 2 seconds to find objects. you can find items over distances up to 100 feet 4 key ring receivers make it easy to find 4 different items