Detection range up to 15mThe ultrasonic penetration range is 50 feet, covering indoor and outdoor areas. Compared with traditional dog trainers, hands are completely free. After the test, the best effectis within 10M. The smaller the range, the better the effect. With LCD display Using the buttons on the anti-bark device can adjust 3 different levels. Compared with other similar products, the frequency and battery level are easier to see. Different dogs can besensitive to different ultrasound frequency bands. Therefore, we recommend maintaining this level for more than 2 weeks. EASY TO INSTALL and WATERPROOFHang or mount our ultrasonic dog bark control device on a tree, wall or fence post to stop your own or your neighbor's dog from barking. Make sure there is noof ultrasonic bark barriers targeting the dog within range. SAFE AND HUMANEThis dog anti bark device has been tested and found to be completely harmless to animals of all sizes. It sure doesn't hurt anyone. Designed with durable waterproof and quality materialssuperior. You can use this anti-bark device as bark control both outdoors and indoors. Both are very safe. Product color box size: 10.4 x 9.3 x 3.7 cm.