The Black No Bark Collar is a rechargeable anti-bark collar designed for medium and large breeds of puppies. Made of durable polycarbonate and nylon materials, this collar is adjustable and features a breakaway closure for safety. The grey color and sleek design make it suitable for both male and female dogs. With a lithium ion battery included, this collar provides the convenience of being rechargeable, ensuring your furry friend is always comfortable and well-trained.