The product designed by high frequency Ultrasonic Technology

The device is equipped with three functions: Repelling Dogs, Training Dog and LED light

This device can effectively discourage the unfriendly dog from approaching without harming them. It's even safe enough to use for training dogs.Effective range: Up to 40 ft

Uses one 9V battery (not included).

It is small enough to fit in your pocket so you can take it virtually anywhere.