Calculates % outside air from either CO2 or temperature Directly calculates dew point and wet bulb temperatures Measures temperature and relative humidity Sampling function records multiple point measurements Dimensions: Meter- 3.3 x 7.0 x 1.8 Probe- Length 7 x Diameter .75 Weight-0.6 lbs Power Requirements: 4 AA batteries or AC adapter > Each Unit Includes Instrument Hard carrying case Downloading software with cable AC Adapter NIST Calibration certificate Operation and Service manual