Feature:1. 2.26 Inch LCD Backlit Screen: This digital wind speed CFM meter features a 2.26 inch LCD backlit screen that displays clearly and is easy to read.2. 6 Measurement Units: This wind speed meter is equipped with easily rotatable fan blades and measures wind speed in 6 units such as ft/m, ft/s, mph, Knots, km/h, m/s, wind speed value x10.3. Multifunctional: This air flow velocity tester is multifunctional and can be used to evaluate indoor airflow in environments such as HVAC, vents, dust collectors, heat loggers, and more.4. Temperature And Humidity Sensors: This anemometer is equipped with temperature and humidity sensors to measure wind humidity and temperature readings. The relative humidity measurement range is 0.0% to 99.9% RH with an accuracy of 5.0% RH at 20% to 80% humidity. The temperature measurement range is 4.0F to 140.0F with an accuracy of 2.0F when 32F to 113F.5. Wide Application: This handheld anemometer has a wide range of applications and is perfect for sailing, windsurfing, drone flying, kite flying, boating and other outdoor activities.Specification:Item Type: Digital AnemometerMaterial: ABSBattery: AAA Battery x 3 ( Shipped Without Battery ).Package List:1 x Digital Anemometer1 x Storage Bag1 x Manual