Total distance display up to 999.99 and interval up to 99.99 Speed indication Calibrate for miles or km. Two calibration numbers. Manually adjustable total distance display. Count up and down facility Split (freeze) function. Electonic memory back up Display back lighting Optinal remote display for speed, interval distance or average speed. Two probe inputs HR model which measures to 1 metre for road surveying applications. Includes a detachable display, which display the speed or traveled part of distance.