Digital Air Velocity Temperature Anemometer Wind Speed Meter Thermometer LCD Features: Used to measure the air velocity and temperature. Two temperature units available: Centigrade and Fahrenheit. Five air velocity units available: m/s, km/h, ft/min, Knots, mph. Quick response with external thermistor. With maximum, average and current air velocity measurement. With Beaufort scale shown on the screen. Wind chill and low battery indication. LCD display with backlight. Automatic and manual power-off. Specifications: Air velocity Unit Range Resolution Threshold Accuracy m/s 0~30 0.1 0.1 ±5% ft/min 0~5860 19 39 Knots 0~55 0.2 0.1 km/hr 0~90 0.3 0.3 mph 0~65 0.2 0.2 Temperature Unit Range Resolution Accuracy Centigrade -10~45 0.2 ±2 Fahrenheit 14~113 0.36 ±3.6 Battery 1 * 6F22 9V (not included) Thermometer NTC thermometer Operating temperature -10~45Centigrade (14~113Fahrenheit) Operating humidity Less than 90%RH Store temperature -40~60Centigrade (-40~140Fahrenheit) Current consumption Approx. 3mA Meter size 15.8 * 5.3 * 3.6cm / 6.2 * 2.1 * 1.4in Meter weight 100g / 3.5oz Package size 20.5 * 15.2 * 5.6cm / 8.1 * 6 * 2.2in Package weight 145g / 5.11oz Package List: 1 * Digital Anemometer 1 * User Manual (English)