TekPower TP6252A Digital Anemometer Wind Speed Air Velocity Meter, Air Flow Meter, MS6252A,HYELEC 6252A Easy to set area dimensions and to store them into the meter's internal memory for next power on Ideal instrument for windsurfing, sailing, fishing, kite flying and mountaineering, etc. Various units for options: units of area (m2, ft2), units of wind speed (m/s, km/h, mil/h, ft/m, ft/s, knots) and units of air volume (CMS, CMM, CFM) Can also be used for industrial and home purpose such as measuring wind speed of CPU computer fans, air conditioners, air blowers, etc. Data hold and maximum / minimum value display