The EL008 data can be collected then downloaded to a computer, alternatively it can be used as a stand alone data logger. If used as a stand-alone logger, you will still need to connect it to a computer (via the serial port) during the installation and set up process. However, once the system is operational, you can disconnect the computer and control the logger using the built in buttons and display. If your logger is connected to a computer, there are many more facilities available to you. An overview of the software is available.