Welcome to my shop We are a pet products franchise store Want to know more about pet products, please visit my store (kooltoollong) Note: If there is loud and lasted noise around, highly suggest that you had better not use this product, the noise environment will affect this product s using life. How to use it: -Place the item 1~2 meters far away from the kennel, note keeping from the rain and humidity, assuring people cannot access easily. -Drilling holes on the wall according to the wall mounting plate, and then insert the plastic base and fitting wall mounting plate using the screws. -A power socket is be needed around this item. -Adjust the item's direction to the dog activity area. -Plug the adapter, turn on the item, completed. -This Anti Bark Device will trigger after more than three times barking, effectively filter out some false triggering cause by environmental noise or dog occasionally bark. -Design by sound control and fitted on the wall, easy to install. -Come with a rotary wall holder, makes the device can rotate 360 degrees freely. -Human cannot hear the ultrasonic, NO harm to human and dog, safe to use. -Note: the device's work performance will be affected by environmental noise, work distance and the volume of dog's bark. -Type: Anti Bark Device -Material: ABS -Quantity: 1pcs -Item Color: As shown -Power Supply: DC 8.4V,500mA -Power Adapter Input Voltage AC: 100V~240V -Size: 7*13*5cm / 2.8*5.1*2" -Net Weight: 0.16kg / 5.6oz