I needed this extension to a lighting control to connect. The laying of the cable in the cable channel proved due to the design (Cascaded USB hubs) but difficult because halfway along a welded electronic circuit board is with dimensions of (not exactly nachgemessenen) approximately 5 x 2.5 x 1.2 cm , With heavy use of tools I was able to remove the covers of the board and force the whole order but then accommodate even the cable channel. Otherwise, the cable is functioning properly and does exactly what it should.