LG Hitachi GH41N 16x DVD&plusmn;RW DL 2 MB Buffer SATA Optical Drive - Black (Certified Refurbished) Certified Refurbished product is tested & certified by Hitachi to work like-new. The product includes all original accessories, and is backed by a 90 day warranty. Black bezel, SATA interface, Windows 7 compatible 2 MB buffer, Buffer-underrun prevention function embedded Write Speed: DVD+R: 16x, DVD-R: 16x, DVD+RW: 16x, DVD-RW: 16x, DVD-RAM: 16x, DVD+R DL: 16x, DVD-R DL: 16x, CD-R: 40x, CD-RW: 14x. Read Speed:DVD-ROM: 10x, CD-ROM: 40x