The Diamond MSP100W Mini Rockers Mobile Speakers provide portability without compromising on its audio performance. They are pocket-sized powerhouses that feature a patented retractable cable system. These portable mini speakers fasten together magnetically, attaining the perfect size that provides quality sound on the go. You can twist each speaker open to expand it for extra resonant bass. The Diamond multimedia mini rockers speakers feature lithium batteries that are fully rechargeable via the USB Y-cable provided with the set or even with the AC adapter of your MP3 player. Each charge will offer up to six to eight hours of play time. The portable mini speakers have a standard 3.5mm headphone port for easy plug-and-play. They are ideal companions for MP3 players, Smartphones, portable CD players, netbooks, laptops and desktop computers.