The contact works with all devices tested here (iPod Nano, iPhone 4, iPad, Notebook) without any problems.
The sound is matched rather strong bass. The mids are clear and the highs tend depending on the material for the artificial little: a slightly artificially-metallic overtones can be heard especially in the compressed material. HiFi friends should always turn up their noses when it comes to Bluetooth transmission. A total of Macrom for the price sounds good though.
A nice gimmick are the control buttons to control phone and mp3 player. This worked well in our test equipment.
For the control buttons, I would like to see a slightly better "tactility", so often the wrong key is caught in the blind operator at the top times.
That the listener can not be folded, restricts the Anwenung traveling unfortunately a bit.
The headphones sit securely and firmly press but after prolonged wearing the little ear pads heavily on the earcups.
With small restrictions but recommended!