K-II Enterprises Ultrasonic Dog Deterrent, 5" x 2" x2"

It can help stop the approach of unfriendly dogs as far away as 20 feet. It is ideal for walkers, joggers, mail workers, meter readers, home inspectors, and more. It is made from lightweight, high-impact plastic and comes with a belt clip and low battery indicator. This electronic dog repellent makes an ideal training aid and is quick and easy to operate. You can use it without worry since it is completely harmless to animals.

Easy and quick to operate Compact, lightweight plastic unit Handy clip for belt Works up to 5 metres (15')