Buffalo Blu-ray & HD DVD Combo Drive. CD write speed: 40 x, CD rewrite speed: 24 x, BD-RE write speed: 2 x. CD read speed: 40 x, DVD-RAM read speed: 5 x, DVD-ROM read speed: 16 x. Disc loading type: Tray, Interface: USB. Dimensions (WxDxH): 50 x 165 x 280 mm, Weight: 1600 g. Compatible operating systems: Windows Vista, XP