What is the difference between a package number and a device number?
A device has a number to identify its device type with the specific hardware and software.
Example: 2014.8081 Exstreamer Store&Play 8 GB
A package is a combination of the device, the power supply (if applicable), the cables and connectors (if applicable) and the packaging.
Example: 2014.9158 Exstreamer Store&Play 8 GB EU Package