The High Tech Pet Products Power Pet Patio Double Pane Panel Pet Door turns any sliding glass door into a fully automatic pet door. It's been pre-installed into an extra-heavy aluminum framed glass insert that fits into your sliding patio door. It's crafted of high quality aluminum and tempered glass coated with an industrial-strength powder coat finish and features a spring loaded top section for quick, snug installation. Fit your pet with the included ultrasonic collar and when he or she approaches, the super-strong resin door panel slides up (not out). Airtight and intruder proof (both animal and human), the door comes complete with everything you need for a weather-sealed, lockable installation, including the transmitter collar and 110-volt AC adapter. Optional backup battery (model B12V-1.3) is not included.