- Accuracy 1% m/s - Air flow volume - Instant/Avg/2/3 V max flow measurement - Velocity m/s, f t/min - Temperature, Humidity & Atmospheric measurement - Calculate Dew point temperature, Wet bulb temperature, Wind chill temperature, Humidex temperature and Heat index temperature - LCD backlight function. - Data hold & Maximum/Minimum/Average function - Manual data memory and read function: 99 sets - Auto data memory: 4GB microSD card (3145U) - USB interface (3145U)