Pet-Friendly Dog Barking Control Device This ultrasonic anti barking device works by sending stable frequency sonic that only dogs can hear, making the dog avoid the annoying voice that causes barking. No Irritating Spray Gas, No Electric Shock, just working when stop barking device sensor catches barking voice. The barking deterrent device is harmless for people and dog hearing, perfect for creating a quiet department for dog lovers and stopping unwanted behaviors. Effective on All Size Dogs The ultrasonic dog barking control device with 3 adjustable sensitivity and frequency levels15-30KHz for large, naughty dogs; 20KHz for docile dogs; 30Khz for small dogs) helps you to choose the different waves to stop different dogs barking easily. Adjusting the frequency of anti barking device for each week can keep the training effect. 33 Ft(10m) extensive controls range is suitable for use to stop a neighbor's dog from barking at you and your family. Easy to use This rechargeable dog barking control device with a light Indicator can be used without any effort. When working on 3 different levels, the light will flash blue every 6s; the Red light stays on 3s when the dog barking deterrent device is triggered by barking; the red light will flash when in low power. 3.7V 1500mAh recharge battery with 5 hours full charge can work for 15 days, saving your endless hassle and investing in batteries. Using in outdoor and indoor The humane stop dog barking devices with IP4 Rainproof function and the portable hook are suitable for use outdoors, and easy to hang on trees, walls, or fence posts. But if it rains heavily, it's best to take it back, which helps protect the equipment and extends its life. This Ultrasonic dog training anti barking device can save space or be set on a desk, wall, and shelf higher than 1.5m indoors, making it more effective to avoid barking,digging,fighting, etc. Royal Service dog silencer bark box comes with a charging cable and 2 screws for easy installation. By using our barking control device and your training, the effect of stopping dogs from barking will be better.