Detection range up to 15MThe ultrasonic penetration range is 50 feet, covering the area indoors and outdoors. 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 display3 different levels can be adjusted using the buttons on the anti-bark device. Compared with other similar products, the frequency and battery level are easier to see. Different dogs may be sensitive to ultrasound in different frequency bands. So we recommend keeping 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 prevent your own dog or that of your neighbors from barking. Make sure the ultrasonic bark is aimed at the dog within range without obstruction.Safe and HumaneThis barking deterrent for dogs has been tested and found to be completely harmless to pets. all sizes. It will certainly not harm anyone. Design with durable waterproof and high quality material. You can use this anti-bark device as a bark control both outdoors and indoors. Both are perfectly safe.Number of pieces delivered: 1Color: Black