HYELEC MS6252A Multifunction Digital Anemometer Handheld LCD Electronic Wind Speed Air Volume Measuring Meter With Backlight This meter is a portable, professional measuring instrument with large-screen LCD and backlight, multi-unit switching functions. This meter can be used for hand-held or fixed measurement. This meter has the functions of reading hold, maximum, minimum, etc. It has a low battery indicator and USB real time data uploading functions. Auto Power Off.