Davis 6410 Wind Vane Anemometer Meter for Vantage Pro/Pro2 Weather Station
Includes both wind speed and wind direction sensors, mounting hardware, and 40' (12M) cable. Wind-tunnel tested to speeds in excess of 200 miles per hour! Wind speed range: 1 to 200 mph, 1 to 173 knots, 0.5 to 89 m/s, 1 to 322 km/h.