Collision Sentry® helps reduce the probability of “blind corner” accidents by sending a warning (synchronized buzzer & flashing light) well in advance of a pending collision. When the system detects motion ONLY on BOTH SIDES of the corner, creating conditions for an accident, it alerts approaching the traffic. Integrated magnets on back allow for easy installation to a metallic corner or rack. Easy to install, self-powered by Size D dry cell batteries, it is highly compact, visible and reliable. New CLN-200 version redesigns the entire product from its predecessor CLN-165, reducing the size, improving efficiency and ease of use.