Pair Car ABS Deer Alert Sound Alarm Ultrasonic Wind Power Animal Repeller(Black)

1. Durable and effective to use.
2. Make sounds through the flow of air, no need battery, very convenient.
3. This item designed to give off an unusual but effective sound which can be heard by animals.
4. Small size and light weight whistle system, easy to install.
5. Good animal alert whistle system suitable for cars, motorcycles, etc.