PetSafe SmartDoor White Dog Door Big Sky sorbic acid (used as a

sorbic acid (used as a preservative)

Effective rub that heals

Recommended worldwide by Veterinarians

Cleans and restores brilliance

to cultivated soil

PetSafe SmartDoor White Dog Door Big Sky sorbic acid (used as aUsing radio frequency technology, the SmartDoor reads the unique signal of a SmartKey worn on your pet's collar and triggers the battery power driven flap to unlock. When the SmartDoor no longer senses your pet's SmartKey, the flap automatically locks back into place. The SmartDoor can detect up to five programmed SmartKeys and also operates in two other modes: fully locked mode and unlocked mode. Locked mode does not allow entry or exit for any pet