Features Clear LCD Display: The RPM tester has a high -sampling frequency and clear LCD display, which facilitates us to read better and has practicality. High Measure Accuracy: This speed gauge can automatically record maximum values, minimum values and last values. It has high measurement accuracy and has great reliability. Performance Stable: This is a non -contact hand -held digital photo speed list. It has the characteristics of use and stable performance and can meet our use. A Variety of Functions: Mini RPM tester meter is with auto range, low battery indication and other functions,is a very useful measurement equipment. High -resolution: The entire measurement range of non -contact photoelectric speed measuring instruments is from 2.5rpm to 99999 RPM, and high resolution is 0.1rpm or 1RPM. Features: 1.This is a non-contact handheld digital photo tachometer with stable performance. 2.Wide measuring range from 2.5RPM to 99999 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 Plastic Display: 5-digit 18mm(0.7") LCD Display Measuring Range: 2.5RPM - 99,999RPM Resolution: 0.1RPM at 2.5-999.9RPM, 1RPM at 1000-99,999RPM Accuracy: ±(0.05%+1 digit) Measuring Distance: 50-500mm / 2-20in Time Base: 6MHz Quartz Crystal Oscillator Range Selection: Auto range Sampling Time: 0.8s(over 60RPM)   Power Supply: 1 * 9V 6F22 Battery(NOT included) Power Consumption: Approx. 30mA Working Temperature: 0℃ ~ 50℃(32℉ ~ 122℉) Item Size: 130*68*26mm / 5.1*2.7*1.0in Package Weight: Approx. 150g / 5.3oz   Package list: 1 * Digital Tachometer  1 * Blue Bag 3 * Reflective Tape 1 * User Manual(English) Package List