HQRP® Thermo-Anemometer (°C / °F) plus HQRP® Coaster; Thermometer range:-10ºC to 45ºC +/-2º; * 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) & 3 Pcs CR2032 Lithium Coin Battery ;Digital and bar graph wind speed display; * Displays celsius or fahrenheit; Neck band included; LCD back light; Shows wind chill when below 0ºC. * Max/Average/Current air velocity measurement. 200 days warranty!