Features: *Dog Bark Control and Dog Training - Our anti-bark device provides a safe and effective solution for dog training and bark control. *Suitable for All Size Dogs - Superaudible frequency wave bark control emits the sound at 20-24KHZ, the sound doesn’t affect humans, but can grab the dog’s attention. *Convenient to Use Outdoor - The control range of the deterrent is 10m. Plus IPX4 waterproof function, no worry to carry to the outdoor and hanging on the tree. *Portable Size & Rechargeable - The device fits perfectly in your hand. With a chargeable lithium battery, take 5hrs charging time can work for 30 days. *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, Silicone Color: