Features Specification Features: ACCURATE MEASUREMENT: Highly precise digital tachometer, laser-aimed, non-contact and safe, fast measures ranging from 2.5~99999RPM, with 50~500mm detecting distance. LCD DISPLAY: Designed with LCD backlit screen, it clearly shows the values, allows easy reading of data even in darkness, and comes up a battery icon when in low power. MORE FUNCTIONS: Multifunctional tachometer features with data record(60 readings), record interval time setup, data hold, max./min./avg. measurement, auto-off for energy saving. COMPACT DESIGN: Well-made tachometer, comfortable to grip, powered by 1 x 9V 6F22 battery, has portable lightweight body, convenient to carry anywhere. WIDE APPLICATION: This tachometer is suitable for measuring rotating speed of model cars, machine, motors, wheels, lathe for metal or wood cutting work etc. Specifications: Material: ABS Color: Blue & Grey Measuring Range: 2.5~99999RPM Resolution: 0.1RPM (2.5~999.9RPM), 1RPM (1000~99999RPM) Accuracy: ±(0.02% + 1digtal) Measuring Distance: 50~500mm Sampling Time: 0.5s (over120 RPM) Power Supply: 1 * 9V 6F22 Battery (NOT included) Operating Temperature: 0℃~50℃ (32℉~122℉) Operating Humidity: 10%~90%RH Storage Temperature: -10℃~60℃ (14℉~140℉) Storage Humidity: 10%~75%RH Product Dimension: 14.5*8.5*4.0cm / 5.70*3.34*1.57in Product Weight: 93g / 3.28oz Package Size: 16.5*9.5*4.5cm / 6.49*3.74*1.77in Package Weight: 123g / 4.33oz Note: Tachometer only, other accessories in the pictures are not included. Please read the user manual carefully for more information before use. Due to manual measurement, there may be deviation, please in kind prevail. Due to lights or other reasons, the picture and material object may slightly differ. Packing List: 1 * Tachometer 1 * User Manual Package List 1 * Tachometer 1 * User Manual