Features This is a non‑contact handheld digital photo tachometer with stable performance. Wide measuring range from 2.5RPM to 99.999 RPM and high resolution of 0.1RPM or 1RPM. High sampling frequency, clear LCD display, high measuring accuracy. This tachometer can automatically record the max value, min value and last value. With auto range, low battery indication and other functions. Features:1.This is a non-contact handheld digital photo tachometer with stable performance.2.Wide measuring range from 2.5RPM to 99.999 RPM and high resolution of 0.1RPM or 1RPM.  3.High sampling frequency, clear LCD display, high measuring accuracy.4.This tachometer can automatically record the max value, min value and last value.5.With auto range, low battery indication and other functions.6.Wide used in the field of motor, wheels, lathe, electrical fan, paper making, plastic industry, washing machines, car making, etc. Specification:Model: DT-2234C+Material: ABS PlasticDisplay: 5-digit 18mm(0.7") LCD DisplayMeasuring Range: 2.5RPM - 99.999RPMResolution: 0.1RPM at 2.5-99.99RPM, 1RPM at 1000-99999RPMAccuracy: ±(0.05%+1 digit)Measuring Distance: 50-500mm / 2-20inTime Base: 6MHz Quartz Crystal OscillatorRange Selection: Auto rangeSampling Time: 0.8s(over 60RPM)  Power Supply: 1 * 9V 6F22 Battery(NOT included)Power Consumption: Approx. 30mAWorking Temperature: 0℃ ~ 50℃(32℉ ~ 122℉)Item Size: 130*68*26mm / 5.1*2.7*1.0inPackage Weight: Approx. 150g / 5.3oz Package list:1 * Digital Tachometer 1 * Blue Bag3 * Reflective Tape 1 * User Manual(English) Package List