6Pcs Ultrasonic Car Alert Whistle for Wildlife and Deer Warning Material: Made from high-quality plastic, this device is designed to withstand extreme outdoor temperatures. The adhesive backing will not damage your vehicle's bumper. Practical Design: Designed with animal safety in mind. Utilizes natural wind power to generate ultrasonic sound waves and physical effects to help deter animals such as deer, dogs, and cats. Helps protect wildlife and reduce the risk of collisions. Operates silently without disturbing drivers or passengers. Easy to Install: Simply remove the protective film from the adhesive on the back and attach it to the front bumper or grille of your vehicle. No drilling required. Suitable for use on most vehicle types. Effective Animal Deterrent: Helps repel animals sensitive to high-frequency sounds, promoting road safety and reducing the likelihood of accidents involving animals. Package Includes: 6 x Ultrasonic Car Whistles Note: 1. Please allow 0.51 inch variation due to manual measurement. (1 inch = 2.54 cm) 2. Actual item color may vary slightly from images due to differences in screen display. Thank you for your understanding.