Practically, good sound

Negatives: The speaker (! No earplugs) are only on the ear, that you so sonicated the environment, which makes listening to music more umpraktikabel about in public transport. In addition, the three buttons (track forward and back, Play / Pause / Enter) are difficult to feel through the cap.

Positives: cap sits well, electronics works perfectly (on compatible devices such as iPhones is also the battery level next to the Bluetooth icon displayed) and can be taken out also, for instance if the cap is to be washed. Can be recharged using the supplied USB cable (no power supply while) directly into the cap. From the sound quality cap confident in the price range sound a bit thin, but for occasional music listening (or calls) having to squeeze great and much better than additional headphones under the cap in the cold season (a point deduction, because it just only small speakers are, and no built-in-ear headphones).