Features: ---Air Velocity Measurement Range: 0.3 to 30m/s (5%) ---Temperature Measurement Range: -10 to 50C (1C) ---Humidity Measurement Range:20%-99% ---Air Velocity Unit Selection: m/s, ft/min, knots, km/h, mph ---Accuracy: 1 degree Celsius ---Accuracy: 5% ---Resolution: 0.1m/s, 1%, 0.1oC ---Operating temperature: 050oC(32122oF) ---Operating humidity: 10 ~ 90%RH Funtions: C / F selection Max/Min/Avg Reading Selection Hold Function (Temperature and Relative Humidity Hold) Wind-chill Indication Low Battery Warning Auto Power Off (with override function) Calibration Function *Use with caution, please read the instructions carefully* Resolution: 0.1m/s, 1%,0.1oC CE Certified & RoHS Compliant Package Includes: ? Meter ? Soft Case ? Wrist Lanyard ? 3V (CR2032)Lithium Battery ? User Manual (English) Note: 1.Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2.Please allow 1-2cm measuring deviation due to manual measurement.