The smart solution for peace and harmony: anti-bell device dogs use ultrasonic frequencies that dogs perceive, but people can hardly hear. This ultrasonic dog guard is easy to use, it only has a few simple buttons, such as the on/off button, gear adjustment button and so on. One push of a button is enough to positively influence the behaviour of a dog. Even in an emergency, you can react quickly and effectively use the dog peller.3-speed adjustable ultrasound: the ultrasonic dog deterrent has 3 adjustable frequencies. Safe frequency sound wave will not harm your dog. You can turn on the sound wave to stop barking and repel malicious dogs, or turn it down to train your dog depending on the situation.LED torch: the dog deterrent has LED lighting design with two high brightness LED lights. You can turn on the lighting with one click to keep you safe even when walking in the dark.Rechargeable anti-barking ultrasonic device with: This dog barking stop is small, lightweight and easy to carry. The built-in powerful battery is fully charged in just 2.5 hours and offers up to 30 days of use or a standby time of up to 60 days. Perfect for daily use or outdoor activities.Wide application: this dog deterrent can be used in a variety of areas, both indoors and outdoors. If there is a dog in your neighborhood that always barks at night, you can calm him down; or in the park, if you meet a group of dogs who constantly bark, you can disperse them.