the photo shows that Pro differs from its previous model, radio components and, for example, the location of the "quartz".
1) What caused the introduction of new radio components and board changes?
2) For sound 2.0, do these radio components have any effect?
Or was it necessary to connect the 7.1 daughter board and make the backlight?
3) Will the gray card version also be on sale or will the Pro version gradually replace it?
4) Why was the front panel connector removed?