Features

Keep unfriendly dogs away; protect yourself from dangerous dogs while walking, jogging, or bicycling

Can work with most dogs, it emits a piercing ultrasonic tone that dogs hate and make dogs away from people.

Safe, humane and effective dog repeller

Can be used to train dogs and bring you more fun;  a 9V carbon battery Included

Stop dog approaching you before it can bite you; A good protector for yourself