Product Description This BT-866A digital anemometer is ideal for outdoor activities such as windsurfing, windsurfing, and windsurfing. veil; Kite flying, Aeromodelling and UAV, Sailing, Surfing, Fishing, Hiking, Shooting, Walking, etc. AVAILABLE USB PORT: Compare to our 866B anemometer, this new 866A-black anemometer provides a more convenient USB port. THREE FUNCTIONS: Wind speed, temperature and wind chill on one screen LCD. Measure speed in 5 units: m/s, km/h, feet/minute, knots, mph. By the built-in temperature controller to adjust the temperature / . Save and recall max/min/average/current function. Low battery indication. With a screw hole, can be connected a lanyard. Features and Specifications: Wind Speed: 0.3~40m/s Temperature, Temp-10~60 14 ~ 140 Wind speed accuracy: &plusmn; 0.1dgts Resolution: 0.1m/s Wind Flow Range : 0~999900m3/min Selection of wind speed unit wind speed: m/s, ft/min, knots, km/h, mph Dew Point YES Return Light YES Low Battery Indication YES Manual/Auto Power Off YES MAX/MIN/Average/Current YES / YES USB PORT YES Real Time Measure YES< br />Battery Type: 2*1.5V AAA Battery (INCLUDED) Package Included: 1*BT-866ADigital Anemometer 2*1.5V AAA Battery 1 * Lanyard 1 * Protective Case 1 * User Manual 1 * USB Data Cable 1 * disc