The headphone jack at the SGN is at the bottom of the unit and the shell has no opening there. It is also definitely not a place to insert a plug laterally out the cable and then close the cover yet. I go regularly connect headset or Kopfhöer that is unfortunately an absolute knock-out criterion, the shell goes back to the dealer. Just inaccessible at CLOSED envelope sender of the USB port, it would be for me in practice, but not so tragic. But to cover both ports is m. E. a glaring design flaws and also a clear contradiction to the product ("all ports can be accessed and continue to operate properly"). Pity! Everything else is okay (materials and workmanship in becoming like those of the "premium" price to be expected), so if you do not need the jacks on the go, you can use the shell entirely.