Stop Dog BarkingThe trainer uses the latest ultrasonic technology, suitable for all breeds and sizes of dogs, the ultrasonic frequency is safe for animals and has no effect on human ears. A safe and humane way to stop your dog and your neighbor's dogs from barking. It can be used as a dog repellent device and a dog training aid to stop bad behavior such as barking, searching and endless fighting. Rechargeable Barking Prevention Device: Our new ultrasonic version for dogs makes it easier to train your dog. Comes with a USB cable, the bark stopper can be fully charged in 5 hours, in most cases, our dog bark device can work continuously for 15 days, but the actual using time depends on the frequency and duration of use. Compared with other similar products which require batteries, our products are more environmentally friendly and save money. Effective Dog Barking RepellentOur repellent bark control has a control range of up to 5m and emits 24kHz ultrasonic waves, this sound does not affect humans (hearing limit is 20kHz). Thanks to the sound signals and ultrasound, it is easy to attract the dog's attention and improve its bad behavior. Regular training is necessary to achieve effective and lasting results. GREAT FOR INDOOR AND OUTDOOR USE: This dog bark control is lightweight and fits perfectly in your pocket for indoor and outdoor use. outdoors. Comes with a wrist strap designed for easy portability. Press the button on this bark control and it emits ultrasonic waves, while a green light means the device is working and a red light means the device needs to be charged. How to use: Whenever your dog is wrong: just press the button and point the ultrasonic clicker directly at him. Once he responds positively, praise him and reward him to strengthen his memory. We are committed to providing the best service to our customers. If you are not satisfied, please feel free to contact us, we will solve your problem within 24 hours.