The PetSafe Electronic Smart Door for Walls controls access in both directions. This door will operate with up to 5 pets using it at once. The easy access control panel allow you to see the mode in which the door is operating in while allowing easy changes to be made. This wall version of the Large Smart Door has an interior tunnel flange piece and 1 extension ring that comprises the tunnel This tunnel assemble will fit walls from 3 1/2" to 7" thick. Additional Extensions can be added, each providing an additional 2" for thicker walls. This electronic door is not recommended for cats as the flap may be too difficult to push through.

Petsafe Electronic Smart Door Large 2" Tunnel Extension Click Here to purchase large 2" tunnel extensions separately
3 1/2" to 7" Thick	No 2" extension needed
7" to 9" Thick	Purchase (1) - 2" Extension
9" to 11" Thick	Purchase (2) - 2" extensions
11" to 13" Thick	Purchase (3) - 2" extensions
13" to 15" Thick	etc..

Important Note: When this door is used in a wall, the flap is on the interior, the tunnel is open to the outside and is not protected from weather. We advise you make extra efforts to weatherize the interior tunnel.

Operation: Unlocks as your pet approaches and locks when flap closes
Base Wall Model fits walls 3 1/2" to 7" in thickness; add 2" extensions for thicker walls