Freecom Blu-ray Combo USB & FireWire. DVD+R read speed: 16 x, DVD-R read speed: 16 x, DVD-RW read speed: 6 x. BD-ROM transfer rate (sustained mode): 480 MB/s. Interface: USB 2.0. Compatible operating systems: Windows 7, Vista, XP Mac OS X. Dimensions (WxDxH): 250 x 165 x 48 mm, Weight: 1200 g