Brand new in the box 3-in-1 Dog Silencer & Pet Trainer: NZONPET dog gentle anti-barking device provides a safe, effective solution for training, bark control, and all of your pup's unwanted behaviors. With an ultrasonic releasing mode, a beep training mode, and a LED flashlight mode, this dog anti barking device helps you to prevent unwanted behaviors like barking, digging, clawing, biting, scratching, and getting on furniture, easy peasy, and other nasty habits in a safe way that won't harm the pup's ears! Equipped with 3 different frequency sound waves: NZONPET ultrasonic dog bark deterrent can emit ultrasonic sounds with three different frequency sound waves; stable frequency, undulating frequency, and irregular frequency sound waves to ensure dogs do not get used to a certain frequency. Grab your dog's attention by simple point and click. Rechargeable long lasting battery life: NZONPET portable stop dog barking device is rechargeable(with a standard USB included in the box) 300mah battery for up to 12 days of use without charging it again. And its standby time is up to 15 days in charging of 1-2 hours only! That makes this device an ideal option with its portable design perfect for anyone on the go! Ergonomic design and easy carry for indoor and outdoor use: The anti-bark control device is built with ergonomic design that fits nicely in your hand, which makes it perfect for indoor or outdoor use! Dog training and bark control devices use unique speakers that reach up to 16.4 ft, making it more convenient to train them to behave well in public and protect them from eating unsafe food. You can also carry the anti-barking control device around to drive dogs away. User’s Guidance: The ultrasonic training clicker doesn't effective in dogs with hearing problems, and we don’t 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