Feature: 1Animal Protection: Made of ABS plastic, the whistle can warn deer and other animals of oncoming vehicles, preventing them from being hit by vehicles and reducing injuries. 2Compact Dual Construction: The whistle features dual construction and one single mount. this compact whistle is easy to hide and replaces traditional separate deer warning whistles. 3How it Works: When your car drives at 30mph or faster, the whistle will automatically make sharp noise and encourage the deer to leave quickly. 4Simple Installation: Just peel off the double-sided tape at the bottom to paste, and stick the whistle to the front bumper, rearview mirror, or any flat place. 5Wide Application: The product is suitable for all brands of cars, vans, trucks and motorcycles. Installation Steps: Step 1: Measure the area in the front of your vehicle to ensure that there is enough room to install the deer whistle. The ideal place is in the grill where the most air flow occurs. Step 2: Clean the area to remove any oil, wax or other substance that will prevent the deer whistle from sticking. Step 3: Peel off the adhesive backing and stick the whistle on to the grill. Double check that the deer whistle is level with the horizon. Keep the deer whistle facing forward. Specifications: Name: Car Deer Whistle Material: ABS Color: black, transparent Size: about 5 * 4 * 1.2cm/1.97 * 1.57 * 0.47in Quantity: 2pcs Features: hiddened, easy to install Installation position: car bumper, flat position of the car front Package include: Car Deer Whistle * 2 Note: 1. Please allow 1-3cm error due to manual measurement. 2. The colors may be different for the different display,please understand.