EXTECH AN10 Pocket Series Anemometer (80~3936ft/min (0.8~72km/h))

Measurement Function
m/s (meters per second): Range and Resolution: 1.1 to 20, Accuracy (of reading): +/‐ (3% + 0.30 m/s)
fpm (feet per minute): Range and Resolution: 80 to 3936, Accuracy (of reading): +/‐ (3% + 40 ft/m)
mph (miles per hour): Range and Resolution: 0.9 to 45; Accuracy (of reading): +/‐ (3% + 0.4 mph)
kph (kilometers per hour): Range and Resolution: 0.8 to 72; Accuracy (of reading): +/‐ (3% + 1.0 km/hr)
Knots: Range and Resolution: 0.8 to 39; Accuracy (of reading): +/‐ (3% + 0.4 knots)

Datasheet

Manual