HP DVD&plusmn;RW Dual Layer Lightscribe SATA Optical Drive 581600-001 575781-500 GH40L Brand: HP Hewlett-packard SATA Optical Drive Model: GH40L Part Number: 581600-001, 575781-500 Device Type: DVDRW (R DL) Read Speed: 48X (CD) / 16X (DVD)