Professional digital anemometer for air velocity and air temperature measurement. Portable size￡? convenient to carry. <br><br><strong>Features:</strong> <br>Specially designed for air velocity and air temperature measurement. <br>Digital LCD display with backlight￡? easy to read and ideal for night use. <br>Press the "UNIT" button￡? the unit indicator will blink; press the "SELECT" button to change units; press the "UNIT" button again to confirm the unit you want. <br>5 optional units: m/s￡? ft/min￡? km/h￡? knots￡? mph. <br>Display the max￡? min and average value. <br>Power off automatically after 1 minute. <br><br><strong>Specifications:</strong> <br>Optional Units: m/s￡? km/h￡? ft/min￡? knots￡? mph <br>Measurement Range: <br><img alt="" src="http://www.guphotos.com/images/uploads/E0589-001.png"> <br>Working Temperature: -10??C ~ 50??C <br>Working Humidity: 40% ~ 85% <br>Power Supply: 9V Battery (not included) <br>Item Size: 13 * 7 * 3cm / 5.1 * 2.8 * 1.2in <br>Item Weight: 255g / 9oz <br>Package Size: 25 * 21 * 5.5cm / 9.8 * 8.3 * 2.2in <br>Package Weight: 703g / 24.8oz <br><br><strong>Package List:</strong> <br>1 * Anemometer(1*Host￡? 1*Fan) <br>1 * Case <br>1 * User Manual(English)