Unique, circular and slightly larger than a CD-ROM disk with a diameter of only 5.3" or 135mm, the Archos Cesar with patented Micro Power Management is the smallest portable CD-RW drive on the market today. It is powered directly by any PC notebook or desktop computer, depending on the system. There is no need to use an AC adapter due to Archos patented Micro Power Management (MPM). This is the perfect, easy-to-use, hand-size, mobile solution for making CDs quickly when you're busy and on the move.