The ED3300 Safety Director™ is a high-intensity warning system designed to direct traffic approaching from the rear of a stationary vehicle. The light-stick design allows for unobtrusive interior or exterior mounting, either flush to the vehicle or using the provided mounting brackets. Inside the cab, a modern, soft-touch controller provides fingertip control of the ED3300's nine built-in flash patterns, features an LED display that mimics the selected pattern in real time, and also includes an auxiliary switch (20A auxiliary relay included).