X-Mini MAX XAM15-GR Portable Capsule Speaker System, Stereo, Green All new, specially designed, in-house manufactured, ceramic drivers able to deliver amazing clarity, warm bass and impressive sound levels. Extended battery now lasts 18hrs up from 10hrs in the X-Mini II Compatible with mobile phones, tablets, various multi-media devices. Basically, ANYTHING with a standard headphone jack! BXS Bass expansion system which greatly increases the amount of bass possible in such a small speaker. Micro USB charging for ultimate flexibility.