This unit is an ideal tool for windsurfing， sailing， fishing， kite flying and mountaineering. You can also use it for industrial and home purposes such as measuring wind speed and temperature of CPU， computer fans， air-conditioners， air blowers， etc. This BENETECH GM816 Mini Pocket-size Digital Anemometer adopts new and low power consumption chips along with innovative and scientific design， and then achieves high accuracy， high stability and high cost performance. Besides， adopting ergonomic principle， this tool is comfortable to use. Compact appearance and gorgeous handfeel make sure convenient， quick and easy operation. It is really a necessary tool!                                    Features            Measure wind speed and temperatureThe wind speed measuring range is from 0 to 30m/sCurrent and average wind speed measuringMaximum and minimum wind speed measuringTemperature display in ℃ / ℉LCD white backlight displayAuto / Manual power off                                                            Specifications            Model    GM816    <br>Material    Plastic    <br>Air Velocity    Range    0.3 - 30m/s， 0 - 90km/h， 0 - 5860ft/min， 0 - 65mph， 0 - 55Knots    <br>Resolution    0.1m/s， 0.3km/h， 19ft/min， 0.2mph， 0.2Knots    <br>Threshold    0.1m/s， 0.3km/h， 39ft/min， 0.2mph， 0.1Knots    <br>Accuracy    +/- 5%    <br>Air Temperature    Range    -10~45℃， 14~113℉    <br>Resolution    0.2℃， 0.36℉    <br>Accuracy    ±2， ±3.6F    <br>Power Supply    1 * 3V CR2032 battery    <br>Thermometer    NTC Thermometer    <br>Operating Temperature    -10~45℃(14~113℉)    <br>Operating Humidity    less than or equal to 90%RH    <br>Storage Temperature    -40~60℃， -40~140℉    <br>Current Consumption    About 3mA    <br>Weight    105 g / 3.7 oz    <br>Dimensions    (10.5 x 4.5 x 2)cm / (4.13 x 1.77 x 0.79)    <br>Color    Yellow ， Black    <br>                                                            Package Includes            1 x Digital Anemometer1 x Manual1 x CR2032 Battery                                                            Extra Info