Buffer: 2 MB Manufacturer: Panasonic Type of Device: DVD+RW/DVD-RW/DVD-RAM Interface: ATAPI. Writing speed: DVD+R9 Dual Layer 2.4x DVD+R 8x DVD+RW 4x DVD-R 8x DVD-RW 4x DVD-RAM 5x CD-R 24x CD-RW 10x Reading speed: DVD-ROM 8x CD-ROM 24x. Supported Formats: BD-ROM not support BD-R not support BD-RE not support HD DVD-ROM not support HD DVD-R not support HD DVD-RW not support DVD-ROM read DVD+R9 Dual Layer read/write DVD+R read/write DVD+RW read/write DVD-R9 Dual Layer not support DVD-R read/write DVD-RW read/write DVD-RAM read/write CD-ROM read CD-R read/write CD-RW read/write . inner box with dimension of 21X17X8.2cm and gross weight of 500g,30pcs per outer carton.