Features Mcu and Electrooptical Technology: The contact digital tachometer applies the MCU and electrooptical technology, can perform contact measurement of rotating & linear rolling speed efficiently. LCD Display: 0.5-19999RPM, wide measuring range and high resolution. Large LCD display with clear reading. Automatically Store: The digital rotation meter can automatically store for the Maximum, Min and LAST value, and accessories convertible for different measurement. Convenient to Measring: The contact digital tachometer is equipped with convex channel lineal rate sensor, it is convenient for measuring the lineal rate of the wire, cable, ropes etc. Low Battery Indication: The digital speed detector has low battery indication, so you can know when need to replace the battery. Specification: Measure range: 0.5-19999RPM 0.05~19999.9m/min 0.2~6560Ft/min Resolution ratio 0.1RPM, 1RPM 0.01m/min, 0.lm/min 1Ft/min Measure error: ±(0.05%+1 digit) Sampling frequency: 0.8Sec Max/Min:Yes Equipped with multi sensor: Yes Low power notice: Yes Measure method: Contact Data lock: Yes LCD backlight: Yes Working temperature 0~50o℃ Storage temperature -20~70℃ Power 3*1.5V AAA battery(Not include) Weight 132g Product size 155*55*35mm Package list: 1 * Digital Tachometer(without battery) 1 * User manual 1 * Accessory(Bag) Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. Package List