2 PCS Car Deer Whistles Warning Device, Voice Chirping Animal Repeller, Anti-Theft Horn Alarm Gadget for Avoids Collisions, Universa for Car and Motorcycle Exterior Accessories (Transparent)

So far so good. I haven't hit any animals so I guess it is working! It was easy to apply to the front grill on my car.

They are crafted from durable materials and they withstand various weather conditions and are discreet in appearance. Blends seamlessly with my vehicle. These whistles are compact and mount easily to the front of my vehicle, utilizing airflow to produce the sound rather than requiring batteries or electrical power. The tape that holds them in place is very durible.

Was coming around a corner at the top of a hill and saw a herd of deer grazing at the bottom, probably 350-400 ft (basically a football field) away. Hey all lifted their heads and moved away. My car is essentially silent as it’s electric, so I’m guessing it was the whistles. Made me feel much safer on the road, especially at night