This is a safety device designed to reduce accidents with an airflow-activated deer warning system. The Bell Automotive Products (Hopkins Manufacturing Corp) "Deer Warning" is a new approach product developed to reduce the risk of collisions between vehicles and animals such as deer. It utilizes wind pressure generated while the vehicle is in motion to emit ultrasonic waves of two different volumes and frequencies. The main feature is that it generates two types of ultrasonic waves by utilizing "wind pressure" while driving. The sound produced by the two ultrasonic waves with different pitches sounds like a "strange and peculiar sound" to animals such as deer on the side of the road, which they have never heard before. The purpose is to make the animals stop in their tracks and "pass by while they are looking around." These ultrasonic waves are effective "composite pitch sounds" and are not warning sounds that are intended to scare or frighten animals to drive them away. The purpose is to make animals on the side of the road stop in their tracks. If you honk the horn to avoid animals that may suddenly appear while driving, you may unnecessarily startle the animals. Not only is it impossible to predict which direction the startled deer will run, but there is also the possibility that they will jump out directly in front of the moving vehicle. Can be used on both motorcycles and cars. - Brand: BELL - Product Name: Deer Warning - Function: Airflow activated - Installation: Easy to install and remove Thank you for viewing. Although it is an unused item, it has been stored for a long time. Please take a look at the images and purchase with your understanding. It will be shipped in a compact package with simple packaging.