I ordered these mini-speakers after seeing a video about them on Youtube. Well they are even better in person! The sound is incredibly pure and powerful enough given their very small size. By placing them on furniture or wooden support means low out even better! Each speaker has its built-in battery, this prevents pull the battery from the phone / mp3 / tablet on which the branch. The duration of use is simply phenomenal, more than 13 hours without recharging already in 2 months. The supplied cable is very well designed, it can plug them into the headphone output jack (3.5), but also to recharge on the computer through USB. The small cloth carrying pouch that is provided is also very convenient. The sound quality, product finishing, functionality and small footprint justify the price of these speakers I recommend.