1,The super small ,stylish and novel design ,this sleek and compact portable travel speakers delivery richness sound. 2.With a effective internal magnet and full frequencies speaker,which means perfectly reproduce sound. 3,The 3.5 mm stereo plug connects directly to the socket of virtually all MP3,MP4,CD, Portable Audio Player,laptop computer as well as iPods. 4,There are 3 ways to power the ES-08B,internal 4* AAA batteries ,external from your laptop computer' USB port and externally using a 6 volt AC/DC adaptor ( not included )