Description: Material: Digital Anemometer Handheld is made of ABS material and is designed to withstand the rigors of outdoor use.Size: Wind Speed Meter Gauge measures 19.7cmx6cmx3.3cm, which is compact and portable, making it easy to carry with you for various weather related activities.Upgrade: Air Flow Meter is equipped with temperature and humidity sensors. It also includes a USB interface for real time of wind speed on your computer.Function: Wind Speed Meter has a full view screen with backlight for clear readings in any light conditions.Easy to use: Air Speed Meter offers multiple wind speed units that can be easily switched at the touch of a button. In addition, it also provides point/wet bulb temperature measurement for comprehensive environmental data analysis. Specification: 3 AAA batteries (not included) Size Chart: 19.7cmx6cmx3.3cm/7.76inchx2.36inchx1.30inch Package Includes: 1 Anemometer1 Instruction Manual Note: Please allow slightly errors 1-2cm differences due to manual measurement.