With the Electronic Pet Door, your cat and dog enjoy effortless access to the outdoors while you maintain the comfort and security of your home. This device is designed so that only your pet with a corresponding key can enter and exit, while keeping unwanted visitors like squirrels or rabbits from intruding. Accommodating up to five keys, this solution becomes a favorite for households with multiple pets, blending safety and convenience. Features Grants personalized access for pets Ideal for multi-pet households Includes 1 Electronic Pet Door Key that attaches to your pet’s collar Install into standard size paneled, wood, metal or PVC doors or walls 1 1/2 - 2 inches thick Thick wall installation requires a Wall Conversion Kit Battery-operated door uses 4 D-cell batteries, not included Electronic Pet Door Key uses 1 PetSafe® RFA-67 battery, included Tailored entry for your pets Take charge of your pet's movements with three adjustable configurations: key access allows only pets with a key to enter or exit, fully locked prevents any pet from passing through, even with a key, and unlocked lets any pet move freely without restrictions. This feature ensures your household remains secure while allowing your pets the freedom they love. Perfect solution for multi-pet households Designed for homes with more than one pet, this Electronic Pet Door supports up to five programmable SmartKeys™, allowing multiple pets to use the same door. Each pet wears a unique key, offering dependable access and added peace of mind for your home.