Feature: 1. Training Function: Bark collar will only activate when the dog barks to speed up the response and give your dog timely and correct training. 2. Anti Barking: Waterproof bark collar helps stop all kinds of dog barking, the strength automatically increases with the duration of barking. 3. Adjustable Nylon Straps: Dog collars are designed with adjustable nylon straps for a more comfortable dog wearing. 4. Reflective Stripes: Adjustable dogs collar reflective stripes, can find dogs in the dark, and also have a protective effect on dogs. 5. Applicable Dog Breeds: Rechargeable anti barking collar can be suitable for large dogs, medium dogs, small dogs, durable. Specification: Item Type: Bark Collar Material: Plastic, Nylon Battery Parameters: 602030 Lithium Ion Battery 300mah (built in) Applicable Dog Breeds:For Large Dogs, Medium Dogs, Small Dogs Collar: Adjustable Weight: Approx. 110g / 3.9oz. Package List: 1 x Bark Collar1 x Accessories(1 Bag Including 3 Pieces) Note: Ships with built in battery.