ALL THE FEATURES OF OUR POWER PET PATIO DOORS PLUS Smart Phone WiFi Control Operated by MS-5 Deluxe Ultrasonic Pet Collar Also Operated by WIFi Smart Phone App Remote Control from Anywhere (Via Smart Phone App.) Custom Timers (Set up to 20 timers to control when your pet can come in and go out.) The new, improved Low-E energy efficient patio door insert includes a fully Automatic Power Pet Door, mounted in an energy efficient dual pane, Low-E glass panel. This ultra-high quality product combines beauty, sophistication and energy efficiency with the highest technology available today. Fully Automated and Activated by Your Pet's Digitally Coded Ultrasonic Collar: These ingenious doors keep out stray animals while allowing your pets the freedom to come and go without requiring you to act as your pet’s personal doorman. The sleek and elegant design is also rugged and completely wind and weather resistant. No drafts will penetrate your Power Pet door even in hurricane force winds providing a most energy efficient pet door. The Extra-Rugged Design: features dual pane “Low E” tempered glass and an extra heavy duty aluminum frame, coated with an industrial quality "powder coat" finish. Note that in addition to the dual pane, “Low E” glass, the aluminum frame is nearly twice as thick and about 8 times stronger than typical patio pet door panels. The self-contained unit easily fits into your sliding glass-patio door track and adjusts to your door’s individual height with a special spring loaded top section for quick, perfect installation. Your patio door slides shut against our insert and may be locked with our new Universal Quick Lock, designed to fit nearly any sliding glass door. Full Weather stripping is included. The entire installation process usually takes less than one hour. NOTE: This door installs alongside your existing sliding glass door, using up part of the walk through space. Please make sure you have enough open door space to leave ample space for walk through. NOTE: Returns on the sliding glass doors are subject to a restocking fee. NOTE: These doors are AC powered via the included AC adapter. Optional Battery operation requires the purchase of our CRG-12V-1B (charger plus one battery) or CRG-12V-2B (charger plus 2 batteries).