Freecom Blu-ray Rewriter, USB 2.0, 80 mm, 16x, 48x, 32x, 8x Freecom Blu-ray Rewriter. Interface: USB 2.0, Optical disc diameter: 80 mm. DVD+R write speed: 16x, CD-R write speed: 48x, CD-RW write speed: 32x. CD-R read speed: 48x, CD-RW read speed: 32x, CD-ROM read speed: 48x. Weight: 2.65 lbs (1.2 kg). Dimensions (WxDxH): 9.84 x 6.5 x 1.89" (250 x 165 x 48 mm), Compatible operating systems: Windows 7, Vista, XP, Mac OS X 10.4