LiteOn SHM-165H6S ATAPI/E-IDE Half-Height Internal DVD+/-RW Combo Drive with Lightscribe ATAPI / E-IDE half-height internal DVD+/-R, DVD+/-RW, DVD+/-R9, DVD-ROM, CD-R, CD-RW, CD-ROM combo drive SMART-BURN helps prevent buffer underrun error to provide the best burning quality SMART-X adjusts data extraction rate to the fastest allowable speed ABS system reduces vibration and noise during recording and reading Support Double Layer DVD+ / - R9 Recording Function