Features: This product is specifically designed to drive away animals while driving car, using physical phenomena such as sound and ultrasound to drive away animals and protect them from harm. It consists of a closed mouth wind force and a through mouth ultrasonic . When installed on the car, the speed is 40 kilometers per hour or above, and the airflows will pass through the product, producing a sound and the ultrasonic will have a physical driving effect on the animals. Ensure your driving safety with these deer whistles! They effectively warn animals and prevent accidents on the road. Designed for convenience and effectiveness, these mini deer whistles have a double frequency design that helps keep animals away. Made from durable ABS material, they are easy to install and carry. Perfect for drivers who frequently travel through rural areas or drive at night. Suitable for car, trucks, motorcycles, and more, these deer whistles provide an added layer of protections against unexpected animal encounters. Whether you are driving in mountainous regions, forests, or open fields, these deer whistles are essential for keeping animals at a safe distance. Drive with peace of mind wherever you go. Specifications: Material:ABS Package Includes: 2x Deer Whistles note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.