KE-856A split type anemometer is a professional HVAC wind flow gauge supported PC USB connect, which is mainly intended for HVAC tech professionals and AC installers. * This smart air flow tester could display air volume in CFM/CMM when you input the cross-sectional area value and testing. CFM (cubic feet per minute)= Duct cross-sectional area x airspeed ft/min. * Connect to computer via USB cable, then you could monitor wind measurement and download wind reading data freely. * Professional HVAC tool wind tester to balance air flow output, air conditioning system, dust collection system and ventilation system etc. Specifications: * Wind speed range: 0.3~45m/s * Wind flow range: 0~999900m³/min * Temperature units optional: ℃ / ℉ * 600 groups wind measurement storage * 5 Wind speed units: m/s, km/h, ft/min, knots, mph * Wind temperature range: 14 °F -113 °F / -10 °C ~ 45 °C More Features: * PC connect * Data Freeze * Auto Power Off * Backlit LCD Screen * Max / Min / AVG/ (2/3)Max * Resolution: 0.2℃ ; 0.01m/s * Wind Accuracy ±3% of reading * Temp Accuracy ± 1°F of reading Packing List * 1 x USB cable * 1 x user manual * 1 x small screwdriver * 1 x 9V (6F22) battery * 1 x adjustable wind vane sensor * 1 x KE-856A Pro CFM wind meter * 1 x Portable ABS anemometer carrying case