PetSafe SmartDoor

PetSafe brand electronic SmartDoor. This model is for SMALL dogs; 4 pounds to 15 pounds. Fits paneled, wood, metal, and PVC doors 1.5 to 2 inches thick. Flap opening 5.5" by 7⁷/⁸". Decide which pet comes and goes by giving them a SmartKey to your home. This was never used, unfortunately, and has remained in the box since we lost our little doggy. We were extremely excited about using it, but never had the chance. pristine condition.