Characteristic:1. This digital tachometer is a high quality instrument for measuring RPM with wide measuring range and high resolution.2. It features high precision measurement, fast measuring time and long detection distance up to 500mm/20inch with laser.3. This tachometer is very easy to use by applying a reflective dot on the target object, then aiming the dot with a laser beam.4. It has a wide range of applications, including measuring the rotational speed of machines, motors, model cars, wheels, lathes for metal or wood cutting operations.5. The final/minimum measurement is automatically stored in memory and can be displayed at any time.6. With portable design, anti-drop, anti-slip and anti-static design, suitable for single-handed operation with comfortable feeling.Specifications:Condition: 100% NewItem Type: TachometerMaterial: PlasticDisplay: 5 digits, 18 mm (0.7 in) LCDTest range: 2.5 to 99,999 rpm (R/M)Resolution: 0.1 rpm (2.5-999.9 rpm), 1 rpm (over 1000 rpm)Accuracy: (0.05% + 1 digit)Sampling time: 0.8s (over 60 rpm)Detection distance: 50-500 mm (2-20 inches) (laser light source)Time base: 6 MHz quartz crystalTest range selection: automaticPower: 9V 6F22 battery (not included)Power consumption: about 35mAFunction: automatic memory of maximum, minimum and last measured valueSize: approx. 13 x 6.7 x 2.5 cm / 5.1 x 2.6 x 1 inWeight: approx. 151g / 5.3ozPackage list:1 x tachometer3 x strips1 x instruction1 x PU caseNoticed:Please allow 1-3cm error due to manual measurement. Thanks for your understanding.