Features: Measure wind speed and temperature. Large easy-to-read LCD display with backlight. Wind speed in Beaufort wind scale bar graph. Wind chill indication Data hold function High precision pressure sensor Quick response, external thermistor Auto/manual power off Temperature display in C/F Wind speed range: 0-30m/s Wind temperature range: -10 - 45 centigrade (14-113F) Current/max/average wind speed reading Wind speed unit: m/s, Km/h, ft/min, Knots, mph CE Approved Air Velocity Specification: 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 Specification: Thermometer: NTC Thermometer. Range: Between -10°C and 45°C (between 14°F and 113°F) Storage Temperature: Between -40°C and +60°C, between -40°F and 140°F. Resolution: 0.2°C, 0.36°F. Accuracy: ±2°C, ±3.6°F Current Consumption: About 3mA Operating Humidity: Less than or equal to 90% RH. Weight: 0.25 lb approx. Package Included: 1 * Digital Anemometer 1 * 3V CR2032 Battery 1 * Lanyard 1 * User Manual Note: The first picture shows the front side and the back side. There is only one item in each package.