MS-5 Automatic Pet Door Collar 2-Pack, Genuine High Tech Pet Brand Dog Collar for Power Pet Doors - with 6 Free Batteries - 2MS-5-6B3V1A

GENUINE MS-5 ULTRASONIC COLLAR: Power Pet doors are designed to operate with High Tech Pet factory-engineered collars. Non-OEM collars may not activate the door as intended. | Advanced Ultrasonic Transmitter Circutry Specifically Designed to the Power Pet Door Receiver Circuit | No False Triggers, Reliable Operation Opens the Power Pet Door Every Time | Patented Directional Signal Opens the Door Only When Your Pet is on a Direct Approach to the Door | Extended Range (More Ultrasonic Power than any other collar) | Long Battery Life (3 Months or More) - Waterproof, Extra Rugged Design | One size fits all dogs and cats; includes an attractive, tough 27 inch nylon strap | Water Resistant and Fully Immersible for short periods; Stands up to heavy rain showers and is perfect for dogs who love to play in the snow | Genuine High Tech Pet Collar, Guaranteed to Open Your Power Pet Door Every Time, From the company that invented it. | Do not confuse with fake collars using our part numbers MS-4, MS-5 and MS-6