Cheap bluetooth headphones with detachable cord and noise cancelling? Consider Ette MX666.
For the record, I just wanted to clarify that I am no audiophile by any means. I'm just a normal consumer who thought to share my views with you on this purchase.
I was expecting headphones that sound like 5€ headphones straight from China. But they will have the functions I need, i.e. the detachable cable (as it is usually the cable damage that makes the headphones no longer usable), Bluetooth 4.0 for connecting multiple devices at once, some form of noise cancellation, built-in microphone and the ability to adjust the volume directly on the headphones. It would still be a reasonable deal with all those features for 15€.
But these headphones have the quality of sound to crush all the cheap headphones that I've had before. It is not perhaps Boose for 1000€, but it's miles better than the cheapest models.
And in addition, noise cancellation really works. Unlike in case of the open ear headphones Esperanza EH145B, closed ear headphones Esperanza Libero EH163K and the gaming headset 4World 09961, on the same perceivable volume level, It's not possible to hear the radio while sitting right next to it. Bluetooth also pairs and connects to devices without the slightest stumble.
It is true that you can get headphones with better sound quality for similar price (Xiaomi has a thing or two to say about that). But you probably cannot get headphones with all those features and such good sound quality for 15€.
You can get those headphones here: http://rover.ebay.com/rover/1/707-53477-19255-0/1?icep_ff3=2&pub=5575410747&toolid=10001&campid=5338345295&customid=&icep_item=292511232873&ipn=psmain&icep_vectorid=229487&kwid=902099&mtid=824&kw=lg