Deer Warning Whistles Ultrasonic Wildlife Warning Devices\

Premium Quality - The set is made of quality molded ABS plastic with matte surface that endures extreme outdoor temperature.
Warning - Air moving through the device produces sound / ultrasound, gives deer advance warning, they may freeze on the roadside, rather than running across the road into the path of the vehicle.
Includes 4 Extra Bases - Each order comes with four warning device sets and four extra bases.
Easy To Install - Just remove the adhesive backing and stick the whistles to the grill, front bumper, rear view mirror, or any flat place of your vehicle. Make sure the bigger ends faces the front, and the deer whistle is level with the horizon. The ideal place is where the most air flow occurs, followed by grill, front bumper.