Have 2 optical audio outputs (WD TV Live Iriver H140 MP3 Player ... yes there a MP3 player with optical output !!) to a CD player (Accuphase DP 45) connected with optical input. Cable length 2x1m + 1x0,5m. And that part is doing what it should: in each case the signal from a device or by grinding the other! In addition, small and unobtrusive. The connections are good: raced clean and exactly one. Optics / haptics etc is unimportant because the thing anyway behind Hifi shelf disappears. But looks different (better than in the picture). For the money a Topkauf!