If you connect to the device with the configuration utility in the Firmware box you will see something like this COM1000.2007.29.133. So if you break it down you get Device.YearOfChange.HardwareRevision.FirmwareVersi on

Simple? Yes?

The truth of the matter is the current hardware platform (.29) has been shipping for several years, so the likely hood of having to update an earlier device is slim.