Helpful Tool: air moving through the deer whistle will produce sound/ ultrasound, this kind of sound can alert deer, elk, moose, antelope and kangaroos approaching vehicles, which effectively avoid deer and vehicle collisions Safe for You and Your PET: the deer warning device is equipped with 10 whistles, 5 of them produce sound waves, the others produce ultrasound; However, people and pets (such as dogs, cats) in the car can't hear it, so there's no damage to your ears or health East to Install and Remove: just remove the backing and apply the whistles to the grill, front bumper, rearview mirror, or any flat place of your vehicle; Make sure the bigger ends are facing the front, and the deer whistle is level with the horizon; The ideal place is where the air flows most, followed by grill, front bumper, they can be easily removed from the base when car washing is needed Quality Animal Alert: made of quality plastic, sturdy, can resist bad weathers; It can work well even stays outside under extremely hot or freezing weather conditions Safe Accessory for Driver: the device is a necessary car accessory for driver who live in a wild area; The whistle produces ultrasonic frequencies and make warning sound, thereby reducing vehicle collisions
10 Pieces deer whistles for car deer warning devices, including ultrasonic and wind whistle, black

Useful animal alert:
If you have to drive through areas where are highly populated with deer, deer warning whistles are helpful for getting deer away from the traffic. The ultrasonic is inaudible to humans or pets inside your car, as it is way out the normal hearing range of people, but wild life can hear it surely, the deer will turn and run away without being harmed.

Features:
Usually, one ultrasonic whistle (a whistle with hole in the tail) is matched with one wind whistle (a closed-hole whistle) to drive deer away in better results.
The deer whistles can attract animals' attention, when your car is moving at 30 mph or faster, the whistles can automatically emit a high-pitched noise and encourage deer to quickly leave out off.
Simple installation and removing steps: just peel off the tape and stick the whistles to the front of your car.

Specification:
Material: ABS
Color: black
Package weight: 180 g/ 6.36 oz

Package includes:
10 x Deer warning devices