This GM8901 Digital Anemometer Wind Speed/Air Velocity/Air Temperature Meter Tester with LCD Backlight is an ideal tool for surfing， 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. It 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             Air velocity/air temperature measurement<br> Wing speed range: 0-45m/s<br> With LCD backlight for clear reading<br> Manual /auto power off<br> Various wing speed units for selection: m/s， Ft/min， Knots， Km/hr， Mph<br> Max/Min/Average value<br> Data hold function<br> ℃/℉ unit switch<br> Wind chill indication  <br>                                                            Specifications             Diemsnions     (5.51 x 2.56 x 1.38)" / (14 x 6.5 x 3.5)cm (L x W x H)    <br> Material     ABS    <br> Weight     7.16oz / 203g    <br> Color     Yellow & Red    <br> Wing Speed Range     0-45m/s    <br> Temperature Range     0-45℃    <br> Wing Speed Unit Selection     m/s， Ft/min，Knots， Km/hr， Mph    <br> Model     GM8901       <br>                                                             Package Includes            1 x Digital Anemometer(1 x Fan，1 x Host)<br>1 x English Manual <br>