[Pet-Friendly Dog Barking Control Device]This ultrasonic device works by sending stable frequency sonic that only 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 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 ]The ultrasonic dog barking control device with 3 adjustable sensitivity and frequency levels(15-30KHz for , naughty ; 20KHz for docile ; 30KHz for small ) helps you to choose the different waves to deal with different barking easily. Adjusting the frequency of device for each week can keep the training effective.33 Ft(10m) extensive control 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 LED Indicator can be used without any effort. When device working on 3 different levels, the light will flash blue every 6s; the Red light stays on 3s when the sonic bark deterrent is triggered by barking; the red light will flash when in low power. Our dog barking control device is equipped with a 1500mAh recharge battery with 5 hours full charge and can work for 15 , saving you the endless cost of batteries.[Using 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. This Ultrasonic dog barking control device can save space or be set on a desk, wall, and shelf higher than 1.5m indoors, which can more effective to avoid barking, digging, , etc.Colour:blackMaterial:plasticSize:12CM x 6.5CM x 9CMPackage Contents:1 x Bark stopper1 x USB cable1 x English manualOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.