I'm surprised to read the comments above ... Can be employees of this brand? For me the sound is low médiocre.Les are absent and the little that comes out is totally distorted. And lost mediums in building I think. There output a bit muffled and powerful! I have a speaker (Mono) ANKER 4W and ten times better and with a 18H autonomy !! Do not tell me he leaves this chamber 6W (2x3W). Also Bluetooth V2.1 standard therefore is not great. We are in 2015 and the current standard is the Bluetooth V4 and this since 2013! The battery life is 4 hours on paper but at 1:45 of Bluetooth think still use this trick to recharge ... No instruction in French, no indication of charging time, no carrying case and a Jack cord in any centimeter and of poor quality.
We had advised me LuguLake Bluetooth V4 and although I regret my choice now.