Ultrasonic Dog Repeller Dual-head Anti Dog Barking Pet Trainer Led Light Gentle Chaser LC023 This product adopts double channel enhanced, double dog training, excitation drive dogs, liting function is one of the super ultrasonic. 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. Used to prevent dog attacks, issue ultrasound to repel the dog or wild wolf. In normal situation, it can be used as a normal flashlight to illuminate at night. Ultrasonic wave reaches up to 125db. Audible to dogs but not to human. Material: ABS Size: 13.7 x 5.5 x 2.5cm Cable Length: 20cm Power Source: 9v Battery Package include: 1 x Dog Repellent ( battery not include)