Features 1、Smart Testing: Can quickly test the rotational speed and vibration frequency of working equipment without contact or stop, high in safety. 2、High Accuracy: Designed to have 60‑99,999RPM wide measuring range and 0.001% high accuracy, the digital stroboscope tool is very reliable. 3、Bright Lights: Equipped with 1500LX high brightness LED, which allows for wider flash range, longer distance and more stable performance. 4、Broad Utility: Widely applied to measuring the speed of machines, motors, lathes, wheels, wood cutting, automotive, fan speed and so on. 5、Easy Carrying: Powered by a rechargeable 7.4V 2000mAh lithium battery, the lightweight and small tachometer is very convenient to carry. Specification Item Type: Stroboscope Model: DT10S Material: ABS Range: 60-99999RPM Speed Measurement Accuracy: 0.001% Illumination: 1500LX Display: LCD Display Power Supply: 1 x 7.4V 2000mAh lithium battery 18650. Power Consumption: ≤0.2W when working, can work continuously for 8 hours, and the standby time is 3 months. Working Environment Temperature: -10℃~55℃ Product Size: Approx. 210 x 90 x 57mm / 8.27 x 3.54 x 2.24in Package List 1 x Stroboscope 1 x USB Data Cable 1 x User Manual