When a dog barks recklessly, defecates on the ground, picks up garbage, bites furniture, bites racks, or surges, press a button to emit ultrasound. Ultrasound can make the dog feel surprised and uncomfortable, interrupting the current barking and stopping the subsequent behavior. Under specific circumstances, dogs will develop conditioned reflexes and develop good cognitive habits by continuously using them for a period of time. This product adopts safe ultrasonic technology and does not cause any harm to dogs. The exterior design conforms to ergonomics, with a small volume and light weight, making it easy to carry. It is easy to operate with a single button and is suitable for walking dogs outside. Product size: 93 * 41 * 31mm Packaging ruler: 135 * 65 * 40mm Product weight: 85g Battery Specification: No. 7 Alkaline Battery * 4 Maximum effective distance: 5 meters Ultrasonic frequency: 25KHZ Packaging: 1 barking stop trainer