Features: * Bark Control & Dog Training - Our anti-bark device provides a safe and effective solution for dog training and bark control. * Suitable to dogs of all sizes - The bark control emits a super audible frequency sound at 20-24KHZ, the sound does not affect humans, but can attract dog’s attention. * Convenient to use outdoors - The deterrent control range is 10m. No worry about carrying it outside and hanging it on the tree. And the button on the surface of the product has a fluorescent effect, which is also convenient to carry out at night. * Portable size and rechargeable - The device fits perfectly in your hand. With rechargeable lithium battery, taking 2 hours charging time can work for 15 days and standby for 60 days. *Tips for you - Anti-bark device is not effective in dogs with hearing problems, and we do not recommend using this product on dogs under 6 months and under 8 years of age as it may interfere with the dog’s hearing development. Training is required to achieve