Product description Rated voltage: 12 (V) Material: ABS Rated frequency: 12V/25MA (HZ) Battery: 9V battery (included) Colour: Black Size: 10*4.2*3.7cm Package content: 1*Handheld ultrasonic dog repeller 1.HARMLESS & EFFICIENT BARK CONTROL DEVICE Our dog ultrasonic trainer provides a safer and more efficient solution with a powerful flash to help users control unwanted barking and bad behaviors such as digging, eating unsafe food, fighting with other dogs, The device's ultrasonic even penetrate fence to prevent neighbor's dog from barking. 2.SAFE FOR PEOPLE & DOGSCompared to other training tools, our device uses the latest ultrasonic technology, with a frequency of 25KHZ, So It makes the pet gentle and human safe to use, The maximum audible limit of humans is 20KHZ. So it won't affect humans but can easily attract the dog 's attention and prevent bad behavior. Training takes some time, you can get good training results by using it patiently. 3.UNIQUE ERGONOMIC DESIGNWe are committed to creating superior quality products, The streamlined design makes it more comfortable to hold, easy to carry and the switch is durable. The power consumption is optimized to allow you to use it for longer and suitable for most dog breeds. 4.POWERFUL LED FLASHLIGHTThe device additionally provided a powerful flashlight. It has a separate button that can be used at the same time as the ultrasonic button. The powerful light function allows you to see around more clearly when you walk around with your dog at night. Blinking lights can make the device more training effect. 5. SUITABLE FOR ALL ENVIRONMENTSThis barking training device can be used on any occasion. For those who go out, the device can also be used for dog training and control dogs to behave well in public and protect them from eating unsafe food and barking colliding with others.