Digital Anemometer, Portable Wind Speed and Temperature Measuring Hand-held LCD Backlight Wind Speed Measurement 0-30M/sec, MAX/AVG Hold Five Wind Speed Measuring Units to Select Detecting wind speed range is 0~30M/sec, temperature range is -10~+45 Five wind speed measuring units to select: M/sec, Ft/min, Knots, Km/hr, Mph; Temperature units are  and LCD display with backlight with CDS sensor, LCD brighter in the darker places.With a tripod thread, you can fix it on tripod. Two wind speed reading mode: you can choose MAX or AVG Powered by one 9V battery (included), you can manual or auto power off There is a MODE button to be hold the highest reading until a higher reading is picked up. The MODE button can also to be used to read the average wind speed. You can switch the temperature between  and  by pressing the MODE for 5s when the meter is on.