Wind Cup Anemometer:Different from vane anemometer, SURLABA XF-881M digital anemometer has 4-cup appearance design, which enables 360 wind speed measurement , records air speed accurately in all directions. Wind speed range: 0.7-42 m/s (accuracy 4% of rdg); Wind temperature range: -10~45C (14~113F). Must-have item for daily outdoor activities and bad weather. Main Functions:This digital wind meter provides 4 units to measure wind speed: m/s, km/h, knots, mph (resolution : 0.1m/s; 0.2 knots; 0.3 km/h; 0.2mph). Temperature display in Celsius or Fahrenheit (/). The compass on the top allows you to determine direction when measuring wind speed. Auto/manual power off; Different modes to record wind speed: MAX/AVG/Current. LCD Backlight and Tripod Hole for Mounting:Our wind speed tester has a large 1.5" LCD display with backlight, you can read and record data even in dark places. The metal threaded hole at the bottom of the anemometer allows you to attach it to a tripod for continuous wind gauges. Free your hands and enjoy flying drones, RC airplanes, long-range shooting.