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 dogs under 6 months and below 8 years old as it may disrupt the dog"s development of hearing. Training is required to achieve highly effective and long-lasting use. Specification: Item Name: Anti-Barking Device Material: ABS Color: Black Power: 3.7V 1500mah Lithium Battery Control Distance: 10 meters Charging Time: 5hrs Using Time: 30 Days Size: 11 x 8.5 x 4.9 cm Weight: 200g Package List: 1 x Anti-Barking Device 1 x Lanyard 1 x Charging Cable 2 x Nail 1 x User Manual