Digital Portable Hand-held Anemometer 30m/s Anemometro Measuring Wind Speed, Temperature, Humidity for outdoor Hiking, Surfing  *【Multi-functional Unit】: Accurately measure wind speed, temperature, humidity, and maximum / minimum wind speed, and can be measured in 5 units: M/s, Km/h, Ft/min, Knot, and Mph. *【Simple Operation】: The operation button is very simple. Short press I to turn on, long press to turn off, short press "I" to switch between °C and F, and long press "M" to select different wind speed units, and long press "M" to switch between MIN and MAX. *【Metal Tripod Hole Design】: The anemometer is not only compact enough to be used in your hand, but also can be attached to the appropriate tripod and placed in the location you want to test. *【Convenient Used】:You will know the hurricane trend before going out. BT-877 anemometer provides fast measurement for analysis of critical environment conditions. *【Quality Warranty】:We have perfect quality warranty. If the meter what you received have any quality issues, please contact our After-sales personnel in time and we will serve you in good faith.  Product Specification:  √ Wind Speed Range: 0.3~30M/s, 59~5905Ft/min, 1~55Knots, 2~90Km/h, 1~65Mph √ Temperature Range: -10℃~45℃(14℉~113℉) √ Operating Temperature:-10℃~45℃(14℉~113℉) √ Power Supply: Button Battery(Not Included) √ Operating RH: ≤90%RH √ Storage Temperature:-20℃~60℃(-4℉~140℉) √ Current consumption: About 3mA √ Weight: 110g  Packing List：  * BT-877 Digital Anemometer x1 * English Manual x 1