Electronic windmeter, meassures windspeed, average and maximum in m/s, km/s, mph, bft, kts, further windchill and temperature

W 10, the patented, smallest, mechanical windspeed indicator in the world you can put in your pocket. The leading German Yachting Magazine proofs pocket sized windspeed indicator with high accuracy at all windspeeds. Moreover W 10 works without external power.