New Anti-Barking Device Automatic Dog Barking Control Device 3 Modes Waterproof Barking Rechargeable Ultrasonic Dog Barking Deterrent for Indoor and Outdoor Dog Friendly Barking Control Device: This anti-dog control device uses ultrasonic technology to intervene in your dogs barking. When the microphone detects a dog barking, the automatic ultrasonic anti-barking device will automatically emit ultrasonic waves to quiet the dog and have no impact on humans or other pets. 3 Adjustable Modes and 33FT Range: The anti-barking device has three adjustable modes - high, medium and low, 15KHZ-30KHZ (high level) for large and naughty dogs, 20KHZ (medium level) for gentle dogs, 30KHZ ( Low level) suitable for small dogs. The maximum effective range of this ultrasonic bark stopper is 33 feet. Lightweight and Portable: This dog barking box looks small and lightweight, making it easy to carry. You can install it on a tree, in a dog house, on a table, or anywhere you find convenient. You can also carry it with you for outdoor use during outdoor activities. IPX4 waterproof and anti-barking box: This device uses IPX4 material waterproof housing. The professional waterproof design allows you to use the anti-barking device without worrying about weather factors. For some unexpected weather conditions, such as rain and snow, the dog barking silencer can still work normally under these harsh weather conditions, freeing your hands and bringing you great convenience. Durable and rechargeable: This dog barking box is equipped with a 1500mAh rechargeable lithium battery that can work for 30 days after 5 hours of charging. The shell material is sturdy and durable, and no other complicated operations are required. The anti-barking device is ready to use after receiving it (charging before use will be better).