CnMemory DVD-RW. DVD+R write speed: 8 x, DVD-R write speed: 8 x, DVD-R Double Layer write speed: 4 x. Disc loading type: Tray, Interface: USB, Mounting: Horizontal. Optical disk diameter: 120 mm. Dimensions (WxDxH): 138.2 x 134.7 x 20 mm, Weight: 0.292 kg. Compatible operating systems: Windows 2000, XP, Vista, Mac OS 10.3