The PetSafe Microchip Key Fob is an essential accessory for cat owners who want to give their feline companion greater freedom while ensuring their safety. This key fob uniquely identifies your cat, allowing them to open the PetSafe Microchip Cat Flap and ensuring no unwanted animals can enter your home. It attaches easily to your cat's collar without hindering movement and is highly resistant and waterproof for carefree outdoor use. This key fob is designed for non-microchipped cats as an alternative to microchip recognition and features simple programming for easy setup. It is compatible with all PetSafe cat flaps and doors.