Laser distance meter MS-40A has up to 40 m measurement, full pythagoras laser distance meter function, min/ max distance tracking function, higher accuracy +/-1.5 mm, quick calculations, easy-to-use addition and subtraction function, front/ rear edge reference, dual laser brightness, 4-line display, 20 complete displays storage, display backlight, tripod mode, audible keypad feedback, enhanced environmental protection, low battery indicator, auto power off and 2 AAA batteries.