Material: Plastic Size: 11cm/4.33*5cm/1.97*3cm/1.18 Power: 9V carbon or alkaline battery section, price does not contain battery Frequency: 35-45 HKZ Features  1, the product is compact, easy to carry pocket 2, at the same time with a high-brightness LED lights for lighting. 3, keep unfriendly dogs away, safe, humane and effective 4. This product uses ultrasound to drive wild dogs and is used as a tool for training pets.