Premium Material: Our wildlife warning device is made of sturdy plastic, resistance to high temperature and sub-zero temperature. The ultrasonic sound is unable to be heard by humans or pets in the car. Main Function: The deer whistle for car bumper is working at the car moving at 35 mph or faster. The whistle makes a sound that can alerts deer, prevent deer or other wildlife from colliding with car. Ensure your safety in a sense. Easy to Install and Remove: Peel off the tape cover and stick the device to your grille or on the top of the hood. Clean the vehicles before application. Can be also easily removed from base for cleaning. Wide Application: These deer warning devices are compatible with all cars, such as motorcycles, trucks, SUV, ATV, etc. Many lives can be saved after using this device. Delivery Quantity: 2pcs Package Contents: Only the above package contents, excluding other products. Size: 5.7*2.3*2.8cm (Reminder: The size is measured manually, please allow 1-2 cm measurement error) color: red (Due to different monitors and lighting effects, the actual color of the item may be slightly different from the color shown on the picture.)