This is the most beautiful shell for the Z1 side Loint super class design, and only found so far that works with the adapter of the dock Sony DK31 magnetic charging. I also tested the Muvit minigel on this website (That I will change by other Krusell) Mumbi and elsewhere who are less aesthetic, much thicker, so can better protect Z1 be the shock, but no way with the DK31 , you must remove the hull and connect the adapter std with them. As against the USB cable> Magnetic proposed Z1 works with all without dock. Just this Krusell if dropped Z1 it may protect a little worse, but the aesthetic perfection, and the support of Sony DK31 Magnetic Dock warrant for me the extra cost of this Krusell!