Joyutoy Mini Digital Pocket Anemometer Weather Meter Monitor Wind Speed Meter Wind speed range: 0-30m/s, 1.4-90km/h , 0-5860 inch/minute , 0-55nM/h, 0-65 inch/h Wind temperature range: -10 - 45 centigrade (14-113F) Resolution Rate: 0.2, 0.2m/s; Wind chill indication Low voltage display, LCD back light display, Large easy-to-read LCD display with backlight. Power supply: CR2032 (3V)(Not included)