2PC Ultrasonic Deer Warning Whistles Animal Wildlife Alert Device Car Safety New !

Now you can greatly reduce the risk of animal/auto collisions with this set of 2 universal sonic whistles!
These wind activated whistles feature:
Alert animals up to 1/4 mile away of your approaching vehicle.
Provide safety for you and your passengers.
Mount easily with adhesive backing.
Fit all trucks, motorcycles, cars, vans and SUV's.
Dimensions: 1.93" L x 1.60" H
Emit ultrasonic sound waves inaudible to humans or pets inside the car.
Sonic warning works automatically day or night at speeds over 35 mph.
How it works:
Air flows in and high frequency sound waves warn animals away.
This does not work with batteries nor charging cable. It works just with air.