This compact ultra-lightweight tool can help you measure wind speed whether you are flying RC planes, drones, wings, helicopters. The 8-in-1 design can also be used to measure temperature, humidity, wind chill, heat index, dew point, barometric pressure, and altitude. Features: 8-in-1 digital anemometer for measuring air speed, temperature, humidity, wind chill, heat index, dew point, barometric pressure, and altitude. Choice of °C / °F, choice of wind speed units: m/s, ft/min, knots, km/h, mph. LCD display with white backlight for clear reading. Maximal, minimal, and average value measurement function (for all measurement modes). Low battery warning, automatic & manual power off function. Data hold function and calibration function. Beaufort scale is always displayed in accordance with the current wind speed in all modes. Pocket size and ultra-lightweight, comes with a storage case and a lanyard for convenient carrying.