The unit is the picture is the Chinese unit that is available from multiple sources. It can come with a BOSE fiber optic adapter to use your stock amplifier.

You have multiple options including the Chinese unit, the Dynavin unit and many aftermarket units from Kenwood/Pioneer etc. The Chinese unit is nice if you want a big screen and features but it does not have any buttons or volume knob. The Dynavin unit has a 7" screen, buttons, many features and is connects directly to your car. Aftermarket units have the most features but you will need mounting bezels and wiring harnesses/Most adapters to connect to your amp.