wind speed range and accuracy of wind speed. Battery IS Included.wind speed, temperature and wind chill display in one lcd. handheld digital anemometer measure in 5 unit：sm/s、Km/h、ft/min、节、mph. temperature measuring units: °c / °fLCD backlight. display (12 seconds active by press any key). auto power shut off: 14 minutes without any operation. low battery indication. handy palm sized, you can keep it in pocket.data hold function: through the built-in temperature regulator to adjust c/f temperature, record and recall max/min/average/current function. and come with a yellow protective case and wrist strap.Our anemometer is ideal for home purpose such as measuring wind speed, air blower, temperature of CPU computer fans, and also can be used for windsurfing, sailing, fishing, kite flying and mountaineering. Suitable for power industry, steel industry, petrifaction industry, manufacturing industry, etc..