Features 1、This digital tachometer is a high-quality instrument to measure the RPM with wide measuring range and high resolution. 2、It's featured with high accuracy measurement, quick measuring time and long detecting distance up to 500mm/20in with laser. 3、This tachometer is very easy to use by applying a reflective point on the target object, then aim at the point by a laser beam. 4、It has a wide range of applications, including measuring the rotational speed of machines, motors, model car, wheels, lathes for metal or wood cutting operations. 5、The final measurement/minimum is automatically stored in memory and can be displayed at any time. 6、With portable design, anti-drop, anti-skid, and anti-static design, suitable for single hand operating with a comfortable feeling. Specifications Condition: 100% Brand New Item Type: Tachometer Material: Plastic Display: 5 digits, 18 mm (0.7 inch) LCD Testing Range: 2.5-99,999 RPM (R/M) Resolution: 0.1RPM (2.5-999.9RPM), 1RPM (over 1,000 RPM) Accuracy: ±(0.05 % + 1 digit) Sampling Time: 0.8s (over 60 RPM) Detecting Distance: 50-500 mm (2-20inch) (Laser light source ) Time base: 6MHz Quartz Crystal Test Range Selection: Automatic Power: 9V 6F22 Battery (not included) Power Consumption: About 35mA Function: Automatic memory of maximum, minimum and last measured value Size: Approx. 13 x 6.7 x 2.5cm / 5.1 x 2.6 x 1in Weight: Approx. 151g / 5.3oz Package List 1 x Tachometer 3 x Strips 1 x Instruction 1 x PU Case