Unique design: Smooth appearance and lightweight design to fit easily into hands, buckle & lanyard design which makes it easy to carry during outdoor activities, matched with exclusive customized color make it looks cute and fashionable. Three uncomplicated buttons integrated with a cartoon image of the dog, which is novel and funny, making this training and anti barking device easy to use for anyone. 3-in-1 training and anti barking device: The dog gentle anti barking device provides a safe and effective solution for dog training and bark control. With an ultrasonic releasing mode, a beep training mode, and a LED flashlight mode, the dog barking deterrent devices can effectively train your dogs to stop unwanted behaviors like barking, digging, clawing, biting, scratching, and getting on furniture, easy peasy. Equipped with 3 different frequency sound waves: The ultrasonic dog bark deterrent can emit ultrasonic sounds with 3 different frequency sound waves, like stable frequency, undulating frequency and irregular frequency sound waves to avoid dogs getting used to a certain frequency. Ultra battery life and rechargeable: The stop dog barking device is rechargeable(with a standard USB included in the box). 300mah battery full charge in 1 to 2 hours, taking this portable no barking device with you for up to 12 days of use without charging it again, and standby time is up to 15 days. It's very suitable for short-distance travel, indoor or outdoor activities, without worrying about low power issues. Users Guidance: The ultrasonic anti barking device doesn't effective in dogs with hearing problems and we dont recommend using this product on dogs under six months or above 8 years old. Training is required to achieve highly effective and long-lasting use.