Features: 1. Mini Type, Easy Operation 2.Wind Chill 3.Low Battery Indicator 4.Beaufort Scale Indication 5.MAZ/AVG/Current Reading display 6.Auto Power Off 7.LCD with Auto Backlight Main Specifications: Measuring Range Air Velocity：0~30 m/s Air Temperature：-10℃~45℃ Accuracy Air Velocity：±5% Air Temperature：±2℃ Resolution: 0.2℃， 0.2m/s Power Supply：9V 6F22 battery Meter Dimension：52.5x35.5x160mm Weight:147g Accessories: Battery, Manual, Paper Card & Blister