Check the listing for details. Automatic ultrasonic barking device anti-dog ultrasonic automatic dog trainer. Condition: New. Listed at 38.88 USD. This professional is designed for dogs to solve the unknown behavior of dogs barking. When the equipment detects the barking of the dog, it will emit ultrasonic waves, which will make the dog feel surprised and uncomfortable. Once the dog stops barking, the ultrasonic waves will stop. For a period of time, it will make the dog form a conditioned reflex and make it clear. Just barking will make it uncomfortable ” . The product moves in the whole process and needs to be operated. There are three gears: low, med and high. And the TEST simulation gear. 750mAh lithium battery, USB fast charging.Electricity, standby time. Product size: 164 * 110 * 60mm Packaging ruler: 195 * 125 * 70mm Product weight: 236g Packing quantity: 48pcs Packing ruler: 530 * 450 * 425mm Packing weight: 18kg Battery: 750mAh lithium battery Maximum effective distance: 15 meters Number of gears: 3 Charging mode: 5V DC/0.5A