Recording temperature, relative humidity, and dew point, the iTHX-SD-5D datalogger allows for measurement of data from two separate locations. You can measure and chart temperature and relative humidity of your local area and of another location 10 feet away. Data can be accessed over an Ethernet network, the Internet or stored on an SD card. This device can trigger an alarm if the temperature or humidity goes above or below a set point that the user determines. It comes complete with a removable 2 GB SD card that can store up to seven years of readings taken at ten second intervals. The format is a simple text file that is easily imported to spread sheets and other programs.