Dog Barking Control DeviceProduct name: Automatic ultrasonic bark stopper Product size: 164mm(L)*110mm(W)*60mm(H) Product weight: about 195G Product material: ABS Battery specifications: 9V alkaline dry battery Applicable environment: indoor environment How it works: The ultrasonic bark stopper automatically monitors the dog's bark in real time. Once the dog's bark is detected, it automatically releases ultrasound to stop the dog's nuisance barking and correct the dog's