Features:Protect your carfrom animal collisions with this square animal warning device made of ABS plastic that can withstand various weather conditions.This device is composed of a closed wind and penetrating ultrasonic wavethat produce a chirping sound and ultrasonic waveto physically drive away animals when the speed is 40 yards per second or highers.This device is suitable for car, trucks and motorcycles and can be easily installed by tearing off the double sided tape at the bottom and sticking it on the front bumpers, rearview mirror or any flatsurface.Suitable for car, trucks and motorcycles. Perfect as a gift for someone who travels a lot in the wild. The deer warning whistle is designed to repels and protect deer and other animals by making distinctive noises. The animal hears the sound and leaves quickly. Specifications:Material:PlasticSize:Approx.3x2.5x1.7cm/1.18x0.98x0.67inchColor:Black Note:.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thanks for your understandings. Package includes:2x Animal Alarms