The X-Mini Max 2 by XMI is the perfect for music on the go. This is an incredible portable speaker!!! These speakers pack a HUGE sound in such a small device. The X-Mini Max 2 comes with 2 modules that can be set apart for stereo playback. You can interconnect multiple X-mini"s with the Buddy Jack system. Don"t worry about batteries becuase these charge by USB and gives you up to 6 hours of playback!!! The Enhanced Bass Xpansion part of the Award-Winning capsule design gives you perfect balance between volume and clarity. The next generation of X-Mini, The X-Mini Max 2, gives you everything you need in a portable speaker!!! Fulfilled and shipped by Amazon so you can buy with confidence.