For portable and frankly at this price this small speaker really surprised. The sound is very well restored and power is the appointment. Not having predominantly used with my MP3 player I can tell that autonomy is well above the advertised 6:00. Small flat, the connection cord 3.5 mn dish that seems fragile to me ... But I'm not a fan of flat drawcords !!! After a few hours of running this little gem gives me satisfaction over its use is amazingly simple. I advise closed eyes to all those who do not want to ruin!