Product Description: Product Name: ultrasonic drive dog training dog barking device texture of material: Size: 10 * 3.7 * 2.5cm Color: Black Product list: host, manual, USB charging cable, lanyard Product function: prevent dog from chasing and approaching, assist in driving, train dog to stop barking and scare away vicious dog usage method: Please charge the device before each use. Use the USB link cable to charge the device directly. The full charge lasts for 8 hours. When charging, the red light indicates charging, and the blue light indicates full charge Features: 1. This product adopts double channel enhanced, double dog training, excitation drive dogs, liting function is one of the super ultrasonic. 2. Drive dog unit, the appearance design is exquisite, easy to carry, especially suitable for outdoor work, outdoor travel and security night patrol, and all kinds of dog training use. 3. Used to prevent dog attacks, issue ultrasound to repel the dog or wild wolf. 4. In normal situation, it can be used as a normal flashlight to illuminate at night. 5. Ultrasonic wave reaches up to 125db. Audible to dogs but not to human. Package Include: 1 x Dog Bark Controller 1 x USB wire Notes: 1. Please allow 1-3 cm difference due to manual measurement and 3-5 g for the difference between different colors. 2. Due to the screen difference, the color may be a little different from what you expect, please allow it.