Ultrasonic dog trainer, which can emit a piercing ultrasonic sound that dogs hate. With this, you can train your pet to be obedient, correct inappropriate behavior and stop barking. Humanized design, safe for humans and safe for dogs. Features: Can be used to train dogs, effectively helping dogs to be obedient, correct inappropriate behavior and stop barking. It can emit a piercing ultrasonic sound that dogs hate, expelling hostile dogs and protecting against dangerous dogs attacking when walking, jogging or cycling. With infrared function can improve ability to expel dogs at longer distance. It can also be used as a torch at regular times, very convenient to use. Work on most dogs, safe and effective, but no harm to human body and pets. With an easy-to-carry rope, convenient and easy to carry. Specifications: Model: ZF-853 Material: plastic The color black Powered by: 1*9V battery (not included) Item size: approx. 135 * 60 * 30mm / 5.31 * 2.36 * 1.18in Package weight: approx. 115g /