This high-precision digital anemometer can help you measure Air Velocity (wind speed) whether you're flying RC planes, drones, wings, helicopters. It's very useful and widely used in hiking, sailing, drone pilot, ventilation system, etc. Features: USB connect with computer for real time data uploading functions. Precisely measuring and it can store up to 50,000 groups of data.This meter is a digital anemometer for measuring the wind temperature, humidity, wind speed, and air volume. Professional measuring instrument with large LCD screen and backlight, multi-unit switching functions. Wind speed unit is switchable: m/s, km/h, mil/h, ft/m, ft/s or knots. Area unit is switchable: m2, ft2. Temperature unit is switchable: Celsius(C) or Fahrenheit(F). Air volume unit is switchable: CMS, CMM, CFM. This meter has the functions of reading hold, maximum, minimum, etc.It has a low battery indicator. Specifications: Material: ABS+TPE Air Temperature: -10 ~ 60C 1.5C/-14 ~ 140F 2.7F Item Size: Approx. 16.5 * 8.5 * 3.8cm / 6.5 * 3.4 * 1.5in Item Weight: Approx. 153g / 5.42oz Package Weight: Approx. 354g / 12.47oz Package Size: Approx. 19 * 11 * 6.5cm / 7.5 * 4.4 * 2.6in Package List: 1 * Multifunction Digital Anemometer 1 * Portable Bag 1 * USB Cable 1 * User Manual(English)