Kit very effective free hand

Advertises his music and to have a hands-free kit with microphone in hand. The device has a very easy to handle even clip of a hand to be attached to a shirt or belt.
There are many buttons for different functions (forward, rewind, pause, volume + and - on / off, call pickup, setting menu). Recharging is done by micro-usb and plug is equipped with a small door (which I personally find impractical).
Too bad that all the functions are not fully exploited by the smartphone that are not of the Sony brand. I would do more tests on my LG G2 to see if there is some way to optimize. What is the big button? I liked it triggers Google Now!
The microphone is fine.
The sound output via the headphones is very good but slightly offset relative to the release of the smartphone headset. The mini speaker on the device is really there in extra: it will only be effective in a quiet room, forget the car!
Pairing is very facile.L'écran LCD is convenient: Display of currently playing track and battery level.
Too bad, the ugly sound in the atria and the power is turned off (to believe that the manufacturers make a contest of bad taste in this area!).
A very good battery life (6-8 hours of listening).
Note that the glossy appearance of the facade easily take fingerprints.