Mastech MS6252B Portable Digital Anemometer Handheld LCD Electronic Wind Speed Air Volume Measuring Meter with Temperature and Humidity Display USB Data Upload Backlight Can be used by hands and fixed on tripods and somewhere else. Easy to set area dimensions and to store them into the meter's internal memory for next power on. With large screen LCD display and backlight.It can be turned off by pressing the Power key. Data holding and maximum and minimum value recording.Low battery indication. It can upload real time data to computers through USB cable.