that is an adapter to fit if you wish to output audio via spdif ( optical cable)
look in the forum for J50C bios updates on how to access BIOS.Is there a user manual about this mini PC. the one delivered with the PC is very basic. How to access the BIOS to setup restart after a power outage. There is also a pin included in the box. No idea what if can be. Also the automatic windows update is blocked. How to access
Keep pressing del key before OS start to enter BIOS.How to access the BIOS to setup restart after a power outage.