Features: *Dog Bark Control and Dog Training - Our anti-bark device provides a safe and effective solution for dog training and bark control. 3 degree sound frequency range meet your different distance need. *Suitable for All Size Dogs - The bark control emits a super audible frequency sound at 15KHZ-30KHZ, the sound doesn’t affect humans and animals, but can grab the dog’s attention and deterrent them from barking. *Convenient to Use Outdoor - With the sensitive degree of 3 tap position, the control range of the deterrent is 10 meters. As we use advanced technology, it works effectively on all sizes of dogs. IPX4 waterproof function, and with a lanyard that the device is very suit hanging on the tree. *Portable Size & Rechargeable - The device fits perfectly in your hand. With a chargeable lithium battery, only take 5hrs charging for 30 days’ work time. *Tips for you - The anti-bark device doesn’t effective in dogs with hearing problems, and we don’t recommend using this product on