Get accuracy, verssatility and durability in a compact gauge that features FOUR measuring modes: real time, maximum, minimum and mean. It has an auto measuring range from 0 to 20,000 rpm with exceptional resolution up to 0.01 at low speeds; an it measures surface speed and distance up to 2,000 fpm with an optional 12” wheel. This battery operated precision gauge measures in twelve different units: rpm, fpm, ipm, mpm, ypm, cpm, inch, yard, feet, meter, centimeter and total revolutions. Has last reading recall and 19 data memory plus low battery indicator. Its sturdy metal housing is lightweight for handheld use with an easy-to-read 5 digit LCD display. Comes with carrying case including multiple tips, optional wheel and AA batteries. HOTO INSTRUMENTS, 3100 Dundee Rd., Suite 707, Northbrook IL 60062-2442 • Range Resolution • 0.40 to 99.99 rpm 0.01 rpm • 100.0 to 9999.9 rpm 0.1 rpm • 10000 to 20000 rpm 1 rpm • Accuracy: ±0.007%, ±1 LSD • Display: 12mm high, 5digit LCD • Battery: Three AA • Battery Life: 100 hours, continuous use • Operating Temp: 0 to 45° C • Weight: 200 g (with batteries)