Pocket Anemometer HP-881M Handheld Anemometer Update Wind Meter with 360° Rotation Any Wind Direction for Measuring Wind Speed, Temperature with LCD Backlight for Shooting 【Higher Accuracy of Anemometer】 Wind Speed Range：0.7～42m/s（Accuracy:±4%Digit), Resolution:0.1m/s. Temperature Range: -10~45℃/14~113℉(Accuracy:±2℃). Measuring result will not be affected by wind direction thanks to the newest design of horizontally rotating wind turbine shells can receive the wind speed from 360°. 【Multi-function Pro Anemometer】 HOLDPEAK HP-881M have functions of Wind Speed/ Wind Temperature. 5 wind speed units:m/s、km/h、MPH、Knots、Ft/min; Temperature (℃/℉),Current/ Max/ Avg, The measurement content is more professional and the measurement data can be hold. 【LCD Large Screen】 With a Large LCD night screen to display the data(Current/ Max/ Avg wind force,Beaufort-barg raph),so the result will easy to read.The measurement data can be clearly obtained even at night. 【Pocket Handheld Anemometer】 Portable Size: 6.5 * 2.1 inches; At the bottom of the anemometer, there is a hole for tripod, Then you can get a precise value because of this tripod’s stability. 【Save Your Battery】 It can automatically shut down if there is no operation for15 minutes. if you have any question about our product, welcome get in touch with us at anytime, we will solve it for you ASAP. Product Description Specifications: Wind Speed Range: 0.7～42m/s Accuracy of Wind Speed: ±4% Digit Resolution: 0.01m/s Wind Speed Unit Selection: m/s、km/h、MPH、Knots、Ft/min. Temperature range: -10~45℃/14~113℉ Accuracy of Temperature range:±2 ℃（± 3.6 ℉） Resolution:0.2℃  Features： ü Wind speed & temperature ü Current/ Max/ Avg wind force ü Beaufort-barg raph ü LCD Back-Light ü Data hold ü Auto shutdown function Data Hold Button: Ø Hold Button which measure the Max/ Avg / Final value within a period of time. Ø First, fix the anemometer at the place where you want to measure wind speed ,press the “start” button to measure. Ø Second, When the measurement is completed, press the “HOLD” button, and the screen will display "HD" symbol, which means that the measured value is locked. Package include： 1 * Holdpeak HP-881M Digital Anemometer 1 * User Manual