GENERAL REQUIREMENTS Using built-in radar, the speed trailer detects the speed of an oncoming vehicle in the near lane and far lane, and then displays that speed on a full-matrix LED display informing drivers of their actual speed. A. 24” character height with full matrix LED display. B. MUTCD compliant. C. Display continuously shows speeds of approaching vehicles over a threshold and does not flash regardless of speed limit. D. Be able to display two digits in MPH. E. Regulatory speed-limit sign with easily changeable speed numbers. F. Approach-only K-band radar. G. Compact and easily portable. H. AGM Battery powered & solar charging. I. Operating temperature range –20° to 165°F. J. Integral control box with tamper-resistant cover that locks (with key) when latched. K. Able to collect and store data (with optional equipment).