Travel SafetyDeer Whistle is a humane animal repellent device that mainly uses natural wind, ultrasonic waves and physical phenomena to keep various animals away from the road and protect them from danger. Can scare away high-frequency sensitive wild animals such as deer, bears, cats, dogs, etc. High Quality MaterialThe deer repellent is made of high-quality plastic, which is very durable. The ruler measures 50mm 31mm. It can withstand extreme outdoor temperatures and can be used even in extremely hot or cold temperatures. Easy to InstallThe deer whistle is easy to install. Simply peel off the bottom sticker and place the alarm on your bumper, grille, top of the hood or any other flat place. Reduce the risk of accidents and protect yourself and your family. Excellent PerformanceThe sound waves and interference generated by the deer whistle cannot be heard by people and animals inside the car, only animals outside the car can hear it, so these animals are requested to stay away from your car to reduce the risk of collision. Wide ApplicationThe car deer whistle is suitable for cars, SUVs, trucks, motorcycles, buses, off-road vehicles and RVs. Sirens provide warnings for deer, elk, antelope and kangaroos to protect you from danger. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.