Material: The deer whistle warning device is made of carefully selected high-strength ABS plastic, it features water and dust resistance, resistance to high and low temperatures, a sturdy structure that is resistant to breakage, durable and not prone to aging, thus extending its service life High-efficiency protection: This deer whistles for vehicles is driven by wind force. When the vehicle speed reaches a certain level, it will automatically issue an ultrasonic alarm to alert nearby deer and other animals to prevent it, providing reliable safety protection for outdoor driving Easy installation: The back of this deer whistle is covered with strong adhesive. No tools are needed. Just clean the surface, rip down the film and stick it on a flat position such as the bumper or grille to quickly complete the installation. It saves time and effort without damaging the car paint Wide compatibility: This deer warning device is suitable for various types of vehicles such as sedans, SUVs, trucks and all-terrain vehicles, without affecting the appearance and driving performance of the vehicles, meeting the travel needs of multiple scenarios Product content: The deer alarm offers 2 piece and 4 piece packages to choose from. There are also black and white color options available to meet the protection needs of different vehicles. It is a reliable safety car accessories for outdoor driving