Duraflex Heavy Duty Dog Door - Medium Deluxe Collars + Boot the door activates automatically via

the door activates automatically via an ultrasonic collar that your pets wear

There is also an optional wall installation tunnel that makes mounting your Power Pet door in a wall even quicker and easier than a conventional flap door

Introducing the best made and most innovative pet doors on the planet

Battery 2-Pack for MS-4 and MS-5 Digital Ultrasonic Pet Collar

Duraflex Heavy Duty Dog Door - Medium Deluxe Collars + Boot the door activates automatically viaDuraflex: The Ultimate Pet Freedom Solution! New Duraflex Pet Doors are the premium brand representing the highest quality, most innovative pet doors made. Our Heavy Duty doors are 100% air tight and withstand winds up to 50 mph! These doors use patented technology with rare earth magnets embedded along the entire periphery of our unique wide flange flap. Mating magnets in the frame are mounted on floating seals to perfectly mate with the flap to