HP-866B Digital Anemometer is ideal for outdoor activities such as Windsurfing, Flying Kite, Aeromodelling, UAV, Sailing, Surfing, Fishing, Hiking, Shooting, Walking etc. Power Supply: 1.5V AAA Battery * 2pcs (NOT including in the package) Basic Function: Wind Speed Test Air Temperature Test Back Light Auto shut down Wind Speed Unit Selection Max/Current/Average Value Wind Chill Indication Temperature Unit Selection Steday Wind Speed Measurement & High Accuracy: Wind Speed Range: 0.3-30m/s and Accuracy: 0.1dgts ESSENTIALS FOR BAD WEATHER:You will know the hurricane trend before going out. HOLDPEAK anemometer provides fast measurement for analysis of critical environment conditions. MULTIFUNCTIONAL ANEMOMETER YOU WILL NEED: Wind Speed, temperature and wind chill in one LCD display. Digital Anemometer Handheld measure wind speed in 5 units: m/s, km/h, ft/min, knots, mph. MORE EXTRA SPECIFICATIONS THAN OTHERS WIND SPEED METER: Through the built-in temperature regulator to adjust C/F temperature. Record and recall Max/Min/Average/Current function. Low battery indication. Screw hole in the button can be connected a lanyard. REASSURING AFTER-SALES SERVICE: We have perfect quality. If the meter what you received have any quality issues, please contact our After-sales personnel in time and we will serve you in good faith.