Very good product, light and stable, good audio quality when playing MP3 or videos, bluetooth correct range (between 5 and 10m). Easy transition from one to a conversation as audio listening to music and back (auto pausing). Plays audio files on micro SD card and also allows reception of FM radios independently (no need to connected device). Read 5h Autonomy mp3 tel + (tested on iPhone). Small flat for the long hair, the flange is tight ...