Ultrasonic dog trainer, which can emit a piercing ultrasonic tone that dogs hate. With it, you can train your pet to be obedient, correct misbehavior and stop barking. Humanized design, safe to humans and harmless to dogs. Features: Can be used to train dogs, effectively helping train dogs to be obedient, correct misbehavior and stop barking. It can emit piercing ultrasonic tone that dogs hate, expelling unfriendly dogs away and protecting yourself from dangerous dogs attacking when walking, jogging, or bicycling. It also can be used as a torch at usual times, very convenient to use. Work on most dogs, safe and effective, but no harm to human body and pets. Equipped with easy-to-carry rope, convenient and easy to carry. Specifications: Model: ZF-851 Material: Plastic Color: Black Powered By: 1 * 9V Battery (Not Included) Item Size: approx. 125 * 45 * 15mm / 4.92 * 1.77 * 0.59in Package Size: approx. 132 * 52 * 27mm / 5.20 * 2.05 * 1.06in Package Weight: approx. 78g / 2.75ounce Notes: