100% Brand New. Color: Black and Red Body Material: Nylon Strap Material: Plastic Size: 6.3 x 5.3 x 3 cm/ 2.5 x 2.1 x 1.2 inch Battery: 6V Battery (Included) High- frequency sound waves and static to stop dog's barking automatically. Operates on a standard 6V Alkaline battery Small and lightweight Effective on dogs from 2-60 kg Microprocessor controlled High quality nylon strap, adjust from 5 to 24 inch Package Content: 1 x Advanced Bark Control Collar