TACHOMETER LUTRON DT-2259 TACHOMETER STROBOSCOPE * Tachometer combine Stroboscope. 2 in 1. * Photo Tach. : 5 to 99, 999 RPM. * Stroboscope : 100 to 100, 000 FPM/ RPM. * 4 x 1.5 V, AA( UM-3) battery power. * Size : 215 x 65 x 38 mm. FEATURES * Intelligent, microprocessor circuit design, high accuracy, wide range, digital readout. * One instrument include two functions of " Digital Photo Tachometer " & " Digital Stroboscope "  * Digital Stroboscope : Wide setting range from 100 RPM to 100, 000 RPM, digital display with high accuracy. Modern solid state high visible orange light, long life, almost maintenance free. It is ideal for inspecting and measuring the speed of moving gears, fans, centrifuges, pumps, motors and other equipment used in general industrial maintenance, production, quality control, laboratories and as well as for schools and colleges for demonstrating strobe action. * Digital Photo Tachometer : No contact RPM measurement, wide measuring range from 0.5 to 100, 000 RPM. 0.1 RPM resolution for the measured value < 1000 RPM. The last value, max., value, min. value can bestored into the memory automatically & be obtained by pressing " Memory Call Button " . Highvisible LCD display gives RPM reading exactly with no guessing or errors. * The use of durable, long lasting components, including a strong, light weight ABS plastic housing. Cabinet has been carefully shaped to fit comfortable in either hand.