Animal protection: Made of ABS plastic, the whistle can warn deer and other animals of oncoming vehicles, preventing them from being hit by vehicles and reducing injuries. Package includes: 2 animal whistles, each whistle is equipped with an adhesive tape, enough to meet your daily needs, the perfect combination of whistle and tape makes you more convenient and easy to use. Simple installation : Just peel off the double-sided tape at the bottom to stick it, and stick the whistle on the front bumper, rear view mirror or any other flat place. How it works: When your car is traveling at 30 mph or more, the whistle will automatically make a high-pitched sound and encourage the deer to leave quickly. Wide range of applications: This product is suitable for all makes of cars, vans, trucks and motorcycles. It is small in size and light in weight, which makes it easy for you to hide well in the car body and ensure safety without affecting the shape of the car body. Color: Black Size: 5*4*1.2 cm Quantity delivered: 2 pieces The product size is measured by hand, there are some errors and the actual product shall prevail. The color of the product is affected by the shooting light and there is a slight color difference, which depends on the actual product received.