Protmex MS6252A Anemometer Portable Wind Speed Meter Gauge Air Volume Measuring Meter with Backlight for Weather Data Collection and Outdoors Sports Windsurfing Kite Flying Sailing Air Flow:0 to 99990 CFM;0 to 9.999ft Air Flow:0 to 99990 CMM:0 to 9.999m Air Flow:0 to 9999 CMS:0 to 9.999 m Category:CE RoHS