The HP 8X External Multi-format DVD Writer with its double layer capability records up to four hours on an 8.5 GB disc. With its advanced LightScribe V.1.2 Technology you can easily burn silk-screen-like images directly onto CDs and DVDs. The HP 8x External Double-Layer DVD Drive supports rapid DVD and CD operation with varying read and write speeds. You can quickly access data stored on the media with the drive’s minimal access time of 130 ms for DVDs and 110 ms for CDs. The HP 8x Double-Layer CD DVD RW Drive comes with a USB interface and is compatible with Microsoft Windows 2000 SP4 XP SP2 and Vista Operating Systems.