This extra SmartKey is used for an additional pet using your Electronic SmartDoor. Our innovative Smart Door recognizes the SmartKey worn on your pet’s collar and unlocks the pet door. After your pet has passed through and the SmartDoor and no longer senses your pet's SmartKey, it automatically locks back into place. Each SmartDoor can program up to 5 SmartKeys.
Features:
- Program up to 5 SmartKeys
- Uses one RFA-67 battery, included
- Weighs 0.7 ounces
- Can be attached to your pet's existing collar