General description Ultrasonic Dog Repeller is a versatile training device that produces a strong ultrasonic sound, which is inaudible to humans but can be heard by dogs. This sound can make dogs feel uncomfortable, helping to deter unwanted barking and behavior. The device also features infrared lamps to assist in training your pet to follow commands, making it easier to guide them during walks or other activities. Technical specifications Type: Ultrasonic Dog Repeller Power: Requires 1 x 9V battery (not included) Usage To use, open the battery cover, insert the 9V battery, and turn on the switch. Can also function as a flashlight when needed. Other information Includes a lanyard for easy portability during activities like jogging, walking, or cycling.