Review on Elook Advanced Deer Whistles for Cars - Deer Whistle for Vehicles and Trunks, Triple Horn Design, 2 Pack (Patent Pending) by Ross Decoteau

The bonnet was very easy to install and the adhesive is strong enough that it will probably outlive the car itself Efficiency I can't say for sure. I never met a deer, I was only given it as an extra measure of protection because a lot passed in front of my car and it made me nervous. I don't think I see that many deer so maybe they can hear me coming.