to select various digital optical audio sources

After reading many negative reviews of ToslinkSwitches, I decided for this ToslinkKupplung. Works perfectly: I have put a 50cm + toslink this coupling in the AV receiver, the audio sources have toslink to 7.5m laid with plastic cap up there. I need to quickly unplug the cable source, change the protective capsule and insert the other cable in the clutch to change. Takes only a few seconds (no laborious plugging into the rear landscaped bushes more). Full surround sound from a total of 8m cable.