Yibid Save A Deer Whistle Alert Horn Wildlife Warning Devices for Car Truck Auto Motorcycles any Vehicle Safe Driving on Freeway (Black, 2 piece);

Mounting the Deer Warnings on a Vehicle .Mounting positions for vehicles must always provide for maximum airflow into the whistle. It also should provide for the sound to project out of the warning device toward the animals. The preferred mounting for the Deer Warning is any position between level and a 30° angle downward Note that the device for the driver's side of the bumper is open through the center Mount each unit 1/3 of the way in from their respective sides of the car, on the bumper. Both devices must be used to obtain the proper frequency range.

Optional Mounting Places - You can mount them on the top of the hood as far forward as possible. You can also mount them on top of the car. Both optional locations should be as far forward as possible.
Non-Recommended Mounting Locations - Behind grill; in the grill; on the end or sides of bumper; on the inner rim of headlights.