Here is a helpful diagram to help you select the GS-911 that will suit your needs.
All GS-911 Enthusiast versions can easily be upgraded to Professional versions excluding the GS-911usb (Generation 2) which is not upgradeable to a Professional version.
*The GS-911 models come with either 10-pin or OBD-II connectors. This development was driven by the new OBD-II diagnostic connectors featured on the newer EU-4 compliant BMW Motorrad models. However, if you need to use your 10-pin GS-911 on a motorcycle with an OBD-II connector, or vice versa, we offer adaptor cables which allow you to do just that.