Features: Wind Activated Ultrasonic Technology: Our deer warning device utilizes advanced wind-activated ultrasonic technology to effectively warn deer and prevent collisions. Easy Installation with Waterproof Adhesive Tapes: Designed with waterproof adhesive tapes, our deer warning device can be easily installed on any vehicle, ensuring long-lasting effectiveness even in harsh weather conditions. Enhanced Safety with Self-Adhesive Tape: Equipped with self-adhesive tape, our deer alerts provide a hassle-free installation process, allowing you to quickly and securely attach them to your car, truck, motorcycle, or suv. Versatile Usage for Various Vehicles: Suitable for cars, trucks, motorcycles, and atvs, our wind-activated and ultrasonic deer alerts offer comprehensive protection against potential collisions, making them a must-have for any vehicle owner. Reliable Collision Avoidance: Designed specifically for trucks and motorcycles, our deer alerts are engineered to effectively warn and help avoid collisions, providing enhanced safety for both the vehicle and its occupants. Specification: Material: ABS Size: 5*3*2.5cm Notes: Please allow slight tolerances in size due to manual measurement, and lighting in photography may result in a difference in color than in real. Include: Choice1-2: 2*Deer Warning Whistles Device OR Choice3: 4*Deer Warning Whistles Device