Records and Exports 1 Year of Environmental Data! Developed to detect the presence of CO2 and to monitor temperature & relative humidity in ambient air, this device is smart, compact and easy to use. Its high quality LCD display, and it features independent CO2, RH and temperature readings. In addition, the APCEMDL comes equipped with a built-in microSD card port that automatically records all environmental data to an included microSD card. Assess and improve your grow room climate with Autopilot's precision monitor with exportable memory. Records and Exports 1 Year of Environmental Data! Measures & records CO2 levels, room temperature, and relative humidityContinuously records data to the included microSD card every 5 secondsExported data is converted to Microsoft Excel file format for easy reviewMicro USB power socket, Micro USB-to-USB power cord, and USB power adapterMax and Min readings of CO2, Temp and RH are shown on screen at each Zoom LevelUnits screen displays 17 sets of data at each Zoom Level: 1 minute, 1 hour, 24 hours and 7 days