Features:

1. Ultrasonic -- Use ultrasonic wave to prevent a dog from barking unnecessarily.

2. Wide Range -- With a high sensitivity microphone inside, the detection range is more than 15 meters.

3. 4 Modes -- Including testing mode , altogether 4 gears.

4. Waterproof -- It’s IP4 waterproof when using outdoors.

5. Easy Use -- After you have set the detection range, please install or hang it at outdoors or on a tree.