DealMux MS6252A Handheld Digital Anemometer Wind Speed Meter Air Flow Tester MS6252A Multi-function Digital Anemometer, easy to use, just one-handed operation. With large screen LCD display and backlight, easy to read data in dark environment. Ideal for model plane pilots, shooters, hikers, and other outdoor enthusiasts. Measure air velocity in 6 units: m/s, km/h, ft/s, mil/h, ft/m, knots in one LCD display. Has the function of holding the reading data and displaying the maximum or minimum value.