Features: brand new and high quality Used to drive wild animals on highways. Packing includes: 2 deer whistles. The deer whistle is made of ABS material, which is more durable and waterproof. Easy to clean. There are two whistles in each package. Both should be used together. Ultrasound and bagpipes. Together, they can send signals at speeds exceeding 35 mph in a collaborative environment, and can warn when a deer arrives. How to use: Remove the sticker on the bottom of the deer whistle and install it on the car. The best installation location is in front of the bumper or car base. The sound of the deer whistle will not affect the people or pets in the car, and only wild animals can hear the ultrasound. Regularly check whether there are residues in the deer post, so that it can be cleaned in for time. Specifications: Material: ABS Size: Approx.3x4x6cm/1.18x1.57x2.36in Color: Black, Silver(optional） Package Includes: 2x Deer Whistles note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.