Petsafe Smart Door for Walls

Bundle for the self-framing PetSafe Smart Door and wall liners for wall installation Fits walls 3 3/4" - 7". Add another 2" extension for large size only, fitting up to 9" wall One RFID Smart collar key included and additional can be purchased here (ships in battery compartment)   Lets you program up to 5 smart collar keys for multi-pet homes Door operates on D cell batteries (not included) The PetSafe Electronic Smart Door and wall liner bundle kit for wall installations. The wall liner is already included in the price. If you are getting a large flap and have a wall thickness between 7" and 9" you have the option of adding another 2" extension. The PetSafe Electronic Smart Dog Door is equipped with RFID technology, which allows you to program which pets can use the door. This electronic pet door is installed with a two way locking door, meaning it can be completely locked or unlocked, or your pet can use the provided RFID collar key to trigger the flap to unlock within a range of