NEC ND4570 16x DVD writer Black, DVD-RW, 2 MB, 48x, 32x, 48x, 25.4 oz (720 g) NEC ND4570 16x DVD writer Black. Optical drive type: DVD-RW, Drive device, buffer size: 2 MB. CD write speed: 48x, CD rewrite speed: 32x. CD read speed: 48x. Weight: 25.4 oz (720 g). Media types supported: DVD-ROM, DVD-R, DVD-RW, DVD+R, DVD+R9, DVD+RW, DVD-Video, CD-ROM, CD-ROM XA, CD-Audio, CD Extra,..., Write methods: DAO, SAO, TAO & zero gap, variable / fixed packet, multisession, Dimensions (WxDxH): 5.83 x 6.89 x 1.65" (148 x 175 x 42 mm)