Blender - InLine OPTO audio coupling unusable

The nonsense with the gold-plated contacts have already mentioned another reviewer, for me the thing but has given up the ghost after only the first use, the clutch inner parts remained on the connectors hanging - are always pulled out or in the outer mount back and forth - that in processing very poor. Perhaps an individual case, also by design. I now have some cheap versions and works a bit better - until they are worn out. Have until now no "professional" version found by this type clutch - I must often reposition the cable - if someone has a tip - like. The seller has responded very accommodating and refunded me the money.