Pioneer continues to lead the way in optical disc technology with the launch of an external optical drive, which it claims as the "worlds smallest & lightest portable Blu-ray burner." The BDR-XD04T is a compact 14mm by 132mm by 132mm (Hx Wx D) & weighs only 240g. It features an easy to use, black clamshell design, as opposed to a slot or tray-loading mechanism. The device has a USB (Universal Serial Bus) 2.0 interface, & also draws power from the USB (Universal Serial Bus) port on your computer — no mains power adapter is required, making it a truly lightweight portable to carry around with you. DVD Read Speed DVD+R: 8x DVD+R DL: 8x DVD+RW: 8x DVD-R: 8x DVD-R DL: 8x DVD-RAM: 5x DVD-ROM: 8x DVD-RW: 8x Blu-ray Read Speed BD-R: 6x BD-R DL: 6x BD-RE: 5x BD-RE DL: 5x BD-ROM: 6x CD Read Speed CD-R: 24x CD-ROM: 24x CD-RW: 24x DVD Writing Speed DVD+R: 8x DVD+R DL: 6x DVD+RW: 8x DVD-R: 8x DVD-R DL: 6x DVD-RAM: 5x DVD-RW: 6x Blu-ray Writing Speed BD-R: 6x BD-R DL: 6x BD-RE: 2x BD-RE DL: 2x