Understand the wind and the weather with this digital Anemometer. This popular, ergonomic, hand held, pocket sized device, the opportunity to accurately monitor localised Wind speed conditions by owning own personal Anemometer at an affordable price. Measure wind velocity in 5 different formats. Anemometer also measures temperature and calculates wind chill. Specifications: Range: 0 - 30m/s, 0 - 90km/h, 0 - 5860ft/min, 0 - 65mph, 0 - 55Knots. Resolution: 0.1m/s, 0.3km/h, 19ft/min, 0.2mph, 0.2Knots. Threshold: 0.1m/s, 0.3km/h, 39ft/min, 0.2mph, 0.1Knots. Accuracy: +/- 5%. Air Temperature Range: -10°C ~ +45°C, 14°F~ 113°F. Resolution: 0.2°F, 0.36°F. Accuracy: ±2°C, ±3.6°F. Thermometer: NTC Thermometer. Operating Temperature: -10°C ~ +45°C (14°F~ 113°F ). Operating Humidity: Less than or equal to 90% RH Storage Temperature: -40°C ~ +60°C, -40°F ~140°F. Current Consumption: About 3mA. Wind speed range: 0-30m/s. Wind speed unit: m/s, Km/h, ft/min, Knots, mph. Dimensions: 10.7cm x 4.5cm x 2.1cm - 4.21inch x 1.77inch x 0.83inch.