Specifications:Air Velocity:Range: 0 - 30m/sAccuracy: ±5%Air Temperature:Range-10°C to 45°CResolution: 0.1m/sAccuracy: ±2°CPower Supply: 1 * 3V CR2032 batteryThermometer: NTC ThermometerOperating Temperature: -10°C to 45°COperating Humidity: less than or equal to 90%RHWeight: 106g (including battery and lanyard) Package:1 x Anemometer1 x 3V CR2032 Battery1 x Lanyard1 x User Manual