Elook Upgraded Deer Whistles for Car, Deer Horn for Car, Save Deer Whistle for Vehicles, Trunks, Motorcycle, Three-Horn, 4 Pack (Patented Product)

Very easy to install. So far on my recent runs no issues and I pass a lot of deer.

Sleek, small fits good with the style of car. So far has work great keeping deer alert and away!

This is the 2nd time that I have bought these, as our family vehicles have increased. I am not positive that they work, but when there have been deer near the side of the road I feel like they look up, as though maybe they hear a noise. If anything helps at all keep animals from getting run over it is worth it.

My house is in a heavy deer traffic area. I easily see deer 2-3 times a week, sometimes more. I bought these to blend in with my black Subaru Impreza sport. I mounted them in a subtle spot in the front grille area. I can definitely see the deer react to the sound of the whistle. The whistles are not a 100% deer repellent. You still have to be alert for them. However, I have definitely noticed more of an avoidance reaction after having them vs before. My only complaint is that at 55 mph, they are definitely loud enough to be heard inside the car if the radio isn't loud. I usually only notice when I listen to audiobooks or I'm talking on the phone (through Bluetooth). Overall, a fantastic purchase. I've had them for 6 months. My car is parked outside and subjected to Indiana winter, but the included adhesive is still holding up. It's very durable and can easily handle the elements as well as interstate speeds.

Great. Have seen deer on the side of the rd. Never moved. Ears standing up like could hear something.

Size is perfect for my car. Haven’t flung off yet. Still holding after multiple drive through car washes. Avoided 7 deer now…happy about that! Silent to driver too!

maybe works... maybe not, depends on who you ask

Great option that appears to work. The pesky dear who like to come to the plant buffet at night, seem dissuaded by the pitch alert and flashing lights, so I consider this a success!