Effective Ultrasonic Anti Barking Device: Dog anti-barking device provides a safe and effective solution for stop dog barking. This bark control device can effectively train your dogs to stop unwanted behaviors such as excessive barking, fighting, digging,eating unsafe food, fighting, etc. Anti Bark Device with 16.4ft Control Range- The small body can easily fit into your pocket, and sensitive microphones can automatically detect dog barking up to 16.4 feet away. It's Convenient to use both indoors and outdoors Safe andamp Humane Anti Barking Device- It provides a safe and effective solution for dog training and bark control, which can effectively train your dogs to stop unwanted behaviors such as barking, digging, eating unsafe food, fighting, etc. Pet Corrector with Long standby- anti bark device can be charged via USB cable(included), Supporting a long daily-use time up to 5 months with only 5 hours of charging Works On All Size Dogs The dog whistle to stop barking devices can be used on dogs of different breeds and sizes. But not recommended for dogs under 6 months because it may disrupt their hearing development, and is also not effective in aggressive dogsor dogs with hearing problems. For better effect, do not use it in noisy environments.