Features: Equipped with 4 powerful ultrasonic transmitters and 3 frequency adjustable automatic ultrasonic control devices, it prevents barking from dogs or neighbor. Ultrasonic frequencies are harmless to pet and completely inaudible to human ear. If the dog's hearing is impaired or aggressive, the device may not function properly. This product adopts waterproof shell, with professional waterproof design allowing you to use the dog barking device, no need worrying about weather factors. Equipped with a 1500mAh rechargeable battery, it can be used for 30 days after 5 hours of charging. The shell material is wear resistant, requiring no other complex operations. You can install it on trees, dog houses, tables, and anywhere else that you find convenient to use. When the microphone detects a dog barking, the automatic ultrasonic antibarking device will automatically ultrasonic to keep the dog quiet, but it will not harm the dog or people. Specifications: Material:ABS Battery Capacity:1500mAh Interfaces:USB C Effective Ranges:33Ft Waterproof:IPX4 Package Includes: 1Set Dog Bark Deterrents Device note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.