This is corporate surplus in new in box NIB condition. This is a Slim line CD-RW / DVD-ROM Drive. With bay caddy, Manuals and install CD. Manufactured by: Toshiba. Part Numbers on unit: PA3104U-2CD2 , SD-R2102 Web research: Indicates that this is a 8x8x24x8x CD: 8x write and rewrite, 24x read and 8x DVD read.