The smallest anemometers available in the market, watertight, high pressure, easy to use, compact size, ideal for all outdoor sports that required wind speed indication; lithium battery, weight 30 g, size 38x88x10 mm, accuracy: ±3%. Features 1) instant wind speed in knots, km/h, mph, m/s - 2) temperature from - 40° to + 80° (-40°F + 176°F) - 3) apparent temperature detected based on wind speed - 4) electronic compass, with detail ±5°- 5) barometer with indication on: absolute pressure from 500 to 1050 hPa; relative adjustable pressure from 500 to 1050 hPa; weather forecast with pressure trend; adjustable altitude up to 8000 meters with 1 meter definition.