The PetSafe SmartKey for the SmartDoor System provides an additional SmartKey that easily fits on your pet's everyday collar for use with the SmartDoor system.
→ Additional PetSafe SmartKey for consumers with multiple pets that will use the Smart Door
→ Each SmartDoor system can identify up to 5 SmartKeys
→ Weighs only 0.64 oz. and fits on your pet's collar
→ Uses RFA-67 Battery