HQRP Compact Digital Anemometer Mini Weather Station Wind Meter & Thermometer plus UV Chain/UV Health Meter HQRP&reg; Thermo-Anemometer (C / F) plus HQRP&reg; UV Chain / UV Health Meter; Thermometer range:-10C to 45C +/-2; Wind speed range: 0 - 30 m/s, 0 - 55 knots, 0 - 90 km/h, 0 - 65 mph, 0 - 5860 Ft/min +/-5%; Auto power off 14 minutes; Power: 3V (CR2032 is included) ;Digital and bar graph wind speed display; Displays celsius or fahrenheit; Neck band included; LCD back light; Shows wind chill when below 0?C. Max/Average/Current air velocity measurement. 200 days warranty!