2 Universal Deer Sonic Alert Animal Warning Black Whistles System Car Truck Bike !

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.
Air flows in and high frequency sound waves warn animals away!