Product characteristics: External CD/DVD reader/recorder with USB interface Allows fast recording of CD/DVD media at 24x for CDs and 8x for DVDs High speed USB 2.0 provides reliability with up to 480 Mbps transmission speeds Silent operation, intelligent control of the speed of reading plates reduces noise during operation. Supports: CD-DA, CD-R, CD-RW, DVD + R, DVD + R DL, DVD + RW, DVD-R, DVD-R DL, DVD-RAM, DVD-ROM DL, DVD-RW, DVD - Video Supported board diameters: 80 mm, 120 mm Dual Layer support: Yes Two free USB ports (one for extra power)