Dell Studio 1535 1536 Slot Dual Layer DVD/CD ReWriter DR 0RK891 RK891 Model: AD-7640SGeneral Features:Slot-loadingSATA interface150 MB/s data transfer rate8x maximum write speed (DVD±R)4x maximum write speed (DVD±R DL)8x maximum rewrite speed (DVD RW)6x maximum rewrite speed (DVD-RW)5x maximum write speed (DVD-RAM)8x maximum read speed (DVD single layer)6x maximum read speed (DVD double layer)24x maximum write speed (CD-R)24x maximum rewrite speed (CD-RW)24x maximum read speed (CD) Compatible Models: Studio 1535,Studio 1536,Studio 1735,Studio 1736,Studio 1737,