SYGA Anemometer, Digital LCD Wind Speed Meter Gauge Air Flow Velocity Measurement Thermometer for Windsurfing Kite Flying Sailing Surfing Fishing Product Description  This Digital Anemometer is ideal for outdoor activities such as Sailing, Surfing, Hand-gliding, Shooting and Walking. It is also ideal for educational instruments.  There are 3 modes to choose from, Maximum, Average and Current wind speed  Features:  Wind speed range: 0-30m/s Wind temperature range: -10 -45 centigrade (14-113°F) Wind speed unit: m/s, Km/h, ft/min, Knots, mph Auto / manual power off Temperature display in °C/°F Large easy-to-read LCD display with backlight. Wind speed in Beaufort wind scale bar graph. High precision pressure sensor Quick response, external thermistor Current/max/average wind speed reading CE Approved  Specification:  Accuracy: ± 5% Powered by a 3V CR2032 battery(INCLUDED) Thermometer: NTC Thermometer Operating Humidity: less than or equal to 90%RH Storage Temperature: -40~60 centigrade, -40~140°F Current Consumption: About 3mA Air Velocity: 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 Air Temperature: Range: -10 -45 centigrade, 14 -113°F Resolution: 0.2 centigrade, 0.36°F Accuracy: ± 2 centigrade, ± 3.6°F  Package Included:  1 * GM816 Digital Anemometer 1 * 3V CR2032 Battery 1 * Lanyard 1 * Protective Case 1 * User Manual