【Detection range up to 15M】 Ultrasound penetration range is 50 feet and covers the area to be covered. inside and out outside. Compared to the traditional dog training device, the hands are completely free. After testing, the best effect is within 10M. The smaller the range, the better the effect.【With LCD Display】3 different levels can be set to using the anti-bark buttons. Compared to; other similar products, the frequency and battery level are easier to understand. see. Different dogs can be sensitive to ultrasound in different frequency bands. We therefore recommend to maintain the level for more than 2 weeks.【Easy to use. 【Install and Waterproof】Hang or mount our ultrasonic dog anti bark device on a tree, wall or fence post to stop your own or your neighbors dog from barking. Make sure the ultrasonic bark is aimed at towards the dog at range without obstruction.【Safe and humane】This barking deterrent for dogs has been tested. tested and turned out to be completely