BT-100 Portable Digital Anemometer Wind Speed Meter Air Flow Velocity Tester for Sailing/Surfing ?Steady wind speed measurement with high accuracy ?Wind speed, temperature, and wind chill in one LCD display ?Adjust the ??/��H temperature through the built-in temperature regulator ?Record and recall Max/Min/Average/Current function ?Powered by 2 x AAA Battery (Not Included) and with low battery indication ?Specification: ?Wind Speed Range: 0.3-30m/s (MAX up to 69mph) ?Temperature Range: -10??-45??,14��H-113��H ?Accuracy: 0.1dgts ?Resolution: 0.1m/s ?Back Light: Yes ?Wind Chill Indication: Yes ?Low Battery Indication: Yes ?Manual/Auto Power Off: Yes ?Wind Speed Unit Selection: m/s Ft/min Knots Km/hr Mph ?Record: MAX/MIN/Average/Current ?Temp Units: ??/��H ?Power Supply: 2 x 1.5V AAA Battery (Not Included) Package included: ?1 x Anemometer ?1 x Strap ?1 x Storage Bag