Product Overview The Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK is a Electronic Training Collars product by Home. It features key upgrades & advantages over ms-5:.Key Features Key Upgrades & Advantages Over MS-5: Water proof--- 100% Waterproof Design, perfect for pets who love swimming, playing in the rain, or running through sprinklers Motion sensor--- Smart Motion Activation Stops unnecessary 24/7 ultrasonic triggers, ensuring your pet enjoys uninterrupted rest Low battery indicator--- Clear Alert (Red LED Indicator) Instantly see when battery is running low—no more guessing or pressing buttons Replacement easy--- Separate battery apartment, replace battery by using a coin Reduce daily consumption--- Use battery CR2032, cheaper and easy to buy Easy to attach--- Durable, Secure Hook provide a strong, reliable hold on your pet’s collar or belt Night walk---Reflective strips for night time walks Why Choose the Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK The Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK offers key upgrades & advantages over ms-5: and water proof--- 100% waterproof design, perfect for pets. These features make the Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK a strong option in the Electronic Training Collars category.Best For The Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK is best suited for: pets who love swimming.Quick Summary The Home Automatic Pet Door Collar - Compatible with High Tech Pet Doors - Replaces MS-4 & MS-5 Collar Keys - BLK-4PK is a Electronic Training Collars product by Home. Size: Medium. Brand: PETZEE. Color: Black. Material: Acrylonitrile Butadiene Styrene (ABS). Price: $98.99.Product Specifications Specification Details Size Medium Brand PETZEE Color Black Material Acrylonitrile Butadiene Styrene (ABS)