This portable personal speaker gives you 360º-sound anytime, anywhere and for hours at astonishing volumes. Boomz packs a big punch, yet measures in at just 2 inches tall. It works using the included USB connector or a line-in earphone jack, also included. Boomz plays wirelessly for 4-6 hours with the help of a micro SD card (not included). Power input: USB power adapter cable 5V/1000mA.