Lite-On 20X Dual Layer DVD-RW Super All-Write (DH-20A4P-33C) Mfr Part Number: DH-20A4P-08 Drive Type: Internal Dual Layer DVD+/-RW Drive Cache: 2 MB Read: DVD-ROM 16X, CD-ROM 48X WRITE Speed: DVD+/-R 20X, DVD+RW, +/-DL 8X, DVD-RW 6X, CD-R 48x, CD-RW 32X