Review on MUTOCAR Alert Vehicles Motorcycle Truck by Todd Look

These whistles are well made and very easy to install. I drove 60 miles with them in a car at speeds up to 70 mph and they stayed car tied. I can't confirm if they actually repel deer. My only complaint is that no installation instructions were included and the photos in the ad show whistles pointing in different directions, including one on the side of the side mirror that doesn't seem to catch the wind at all. A little confusing.