Reads Air Velocity and Temperature on dual display Calculates CMM / CFM based on adjustable duct shape and size Slim sensor (8mm) fi ts easily in 3/8 Inch holes Telescoping probe extends to 7ft (2.1m) Adjustable parameters for Altitude and GAIN Save and view 36 readings on display Min / Max / Average, Data hold and Auto Power Off Complete with telescoping probe with cable, 100V-240V AC Universal Adaptor with 4 plugs, 6 batteries, and hard carrying case