Features: 1. [100% Safety]-Dog barking , which easily catches the dog's attention, but is not hurting to both and human, just like a dog whistle. This dog training device can effectively help train your dog to stop unwanted behaviors such as barking, digging, eating unsafe food, , etc.2. [Effective Control Range]-With the technology, our barking control device has an effective control range that up to 25 ft.3. [High Power]-20Khz-25Khz irregular frequency sound waves can effectively prevent from adapting to specific ultrasonic frequencies, thereby improving the effect of use.4. [Multi-function]-It has two different sound wave modes, which can break the dog's immunity to a certain sound wave.Built-in -capacity battery only needs 2 hours to be fully but works for 30 days.5. [Easy To Carry]-The ergonomic design is very suitable for your hands, and the climbing buckle and hand rope can let you carry this ultrasonic dog barker anywhere.Specifications: Battery: 500mAh Li-ion Polymer BatteryEffective Distance: 5 to 10 MetersMaterial: plasticcolour: blackPackage Contents: 1 x Dog Repeller1 x USB CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.