100% brand new and high quality. Ultrasonic Design: Based on the theory of ultrasonic waves, the dog trainer can effectively train your dog to be obedient and stop some unnecessary behaviors such as barking, chewing, digging, etc. Wide range of applications: Ideal for training all kinds of dogs, such as pets, police dogs, sheepdogs, border collies, sheepdogs, and more. Simple operation: first open the battery cover, then put in 1 9V battery (not included), the sound can only be heard by pets, and finally turn on the switch to work normally, and can also be used as a flashlight if necessary. MULTI-FUNCTIONAL: Besides being a pet training tool, it can also prevent your dog from attacking, suitable for outdoor work, travel and security night patrol. Remote control distance: 8M Power supply: 9V battery (not included) It’s best not to deliberately use a dog drive to tease the dog, because it’s no surprise that the dog listens a lot. When the lights in the dog drive are significantly