Description:The dog is our friend， but sometimes its barking is bothering us. Unexpected barking often disturbs neighbour. How do we let our dogs become more gentle?This is the New Humanely Ultrasonic Anti No Bark Control Device Stop Dog Barking Silencer Hanger， which trigger the ultrasonic wave circuit work through the barking， it will sent out five seconds harsh ultrasonic wave to stop the barking. The dog will build up the conditioned reflex after experienced many repeated the action times， the dog knew the extra sound had been caused by its barking. Afterward the dog wound not bark without reason. In generally， this product will trigger after more than three times barking. With this product， you will liberate from the annoyed barking， and will create a quite environment for youFeatures:Humane solve dogs' barking problemsMaterial: Hard plasticPower Supply: DC 8.4V，500mAPower Adapter Input Voltage: AC 100V~240VAdapter Plug: US PinSize:12.6 x 7 x 4.5 cmColor: As the pictures shownHow to use it:Place the item 1~2 meters far away from the kennel， note keeping from the rain and humidity， assuring people can not access easilyDrilling holes on the wall according to the wall mounting plate， and then insert the plastic base and fitting wall mounting plate using the screwsA power socket is be needed around this itemAdjust the item's direction to the dog activity areaPlug the adapter， turn on the item， completedNote:Do not install in damp， leaking sunlight and easy to encounter a placeThe device isn't applicable to small size dogIf there is the great noise in the around environment， and the noise last long time. Highly suggest that you had better not use this product， the noise environment will affect this product’s using lifeQuantity:1 Set