3 in 1 Anemometer Handheld Wind Speed Meter HP-881W, Handheld Anemometer with Wind Speed/Temperature/Humidity/WBGT Alarm for Drone Flying, Hunting, Sailing 【Pretty Accurate Anemometer】Wind Speed Range：0.7～30m/s（Accuracy:±5%Digit), Resolution:0.1m/s. Temperature Range: 0~50℃(Accuracy:±0.6℃). Humidity range: 0.1%~99.9%RH; Resolution:0.1%RH.Measure wind speed in 5 units:m/s, km/h, Ft/min, Knots, Mph. Wind temp in ℃/℉ 【Multi-function Pro Anemometer】HP-881W have functions of Wind Speed/ Wind Temperature/Humidity/ Black Ball Temperature/ Max/ Min.The measurement content is more professional and Accurate. 【LCD Display】Come with a LCD Display to display data(Wind Speed/ Wind Temperature/Humidity/ Black Ball Temperature/ Max/ Min).Even in the dark environment,also can read the result clearly. 【WBGT Alarm】WBGT Alarm be used to remind whether the current working environment temperature is too high to reduce the harm caused by high temperature environment to people.Suitable for buildings, iron and steel foundries, brick factories, glass facilities, boiler rooms and so on. 【Wide Applications】HP-881W not noly can be used to outdoor activities ,such as drone flying, hunting, sailing, but also to industrial activities, like workshops, steel mills, construction sites, etc. Specifications: Wind Speed Range: 0.7～30m/s Accuracy of Wind Speed: ±5% Digit Resolution: 0.1m/s Wind Speed Unit Selection: m/s、Ft/min、Knots、km/h、Mph Temperature range: 0~50℃ Accuracy of temperature range：+/-0.6℃ Resolution:0.1℃ HP-881W Handheld Anemometer Wind Speed Meter with WBGT You can switch to WBGT measurement by pressing the MODE button.Combining the data of the hazard level table to determine whether the temperature is too high. Tip：Normally, the backlight is green. When WBGT alarms, the backlight color will change to red.  Package include： 1 * HP- 881W Digital Anemometer 1 * User Manual