HP RM475E. CD read speed: 24 x, DVD+R read speed: 8 x. DVD drive average random access time: 130 ms, CD-ROM drive average random access time: 130 ms. Interface: USB, Optical disk diameter: 120 mm. Media types supported: DVD±R/±RW, DVD±R DL, DVD-RAM, DVD-ROM, CD-R/RW/ROM. Minimum RAM: 128 MB, Minimum processor: 1.3 GHz Pentium IV