Description: This tachometer is a high quality instrument to measure the revolutions per minute(RPM) with wide measuring range and high resolution. It is featured with high accuracy measurement, quick measuring time and long detecting distance up to 500mm(20 inch) with Laser. This tachometer is very easy to use by applying a reflective tape(included in package) on target object, then aim at the mark by Laser beam. This tachometer has wide range of applications, such as measuring rotating speed of machine, motors, wheels, lathe for metal or wood cutting work, etc. Non-contact handheld digital tachometer with stable performance. Automatic and manual measurement modes for selection. Specification: MAX./MIN./AVG. values record function. Data hold function, data record and recall(60 readings). LCD screen with white backlight, easy to read. Capable of measuring at a distance from 2-20in(50-500mm). Auto and manual power off. Low battery indication. Color: Black, Blue Material: Plastic Size: 15X9.5X4CM Measuring Range: 2.5-99999 RPM Resolution: 0.1RPM at 2.5~999.9RPM; 1RPM at 1000~99999RPM Accuracy: ±0.02%+1 digtal Measuring Distance: 50~500mm / 2~20in Sampling Time: 0.5s(above 120RPM) Data Storage Capacity: 60 Readings Auto Power Off: After 20s Operation Temperature: 0 to 50°C(32 to 122°F) Operation Humidity: 10 to 90%RH Storage Temperature: -10 to 60°C(14 to 140°F) Storage Humidity: 10 to 75%RH Power Supply: 1 * 9V 6F22 Battery(NOT Included) Package Includes: 1X Digital Tachometer