High Tech Power Pet Smartphone Controlled WiFi Pet Door for Walls

App-controlled automatic pet door for walls Automatic flap uses ultrasonic collar keys to unlock and open Waterproof MS-5 collar key included for operation Door raises automatically so pets don't have to push through  Choice of electrical or battery operation  The High Tech Power Pet Smartphone-Controlled Pet Door for Walls is an automatic pet door that you can control directly from your phone. This pet door shares the same great features as the High Tech Power Pet Wall Mount, but with app-control technology that allows you to operate the pet door from any location. WiFi is required to access the pet door through the smartphone app.  The app gives you remote control over the door's automatic features. Set up to 20 custom timers to control when your pet can come and go, and view app history to see the number of times the sensor is triggered in a day, week, month, or year.  Features: Installs in walls 4" - 6" thick and can be installed in walls up to 12" with an additional heavy-dut