TEAC DV-W28U-VS3. CD write speed: 24 x, CD rewrite speed: 24 x, DVD+R write speed: 8 x. CD read speed: 24 x, DVD+R read speed: 8 x, DVD-R read speed: 8 x. Disc loading type: Tray, Optical drive type: DVD±R/RW, Interface: USB. Dimensions (WxDxH): 134 x 134 x 18 mm, Weight: 250 g. Minimum system requirements: USB 2.0, Compatible operating systems: Windows XP Windows Vista Windows 7