Desktop/Laptop DVD±RW USB 2.0 Mounting: Horizontal CD, CD-R, CD-ROM, CD-RW, DVD, DVD+R, DVD+R DL, DVD+RW, DVD-R, DVD-R DL, DVD-RAM, DVD-ROM, DVD-RW Black Double security on-the-goDisc Encryption doubles the security with Password-controlled and hidden-file functionality.3 easy steps to complete disc burningDrag-and-burn interface accomplishes entire jobs in three easy steps.Bright and Dazzling DesignElegant appearance embody the harmonious marriage of technology and aesthetics. Reading speed DVD+R Double Layer read speed 8x DVD+RW read speed 8x DVD+R read speed 8x DVD-R read speed 8x DVD-RW read speed 8x DVD-RAM read speed 5x DVD-ROM read speed 8x DVD-R Double Layer read speed 8x CD-R read speed 24x CD-RW read speed 24x CD-ROM read speed 24x CD read speed 24x Access time CD-ROM drive average random access time 140 ms DVD drive average random access time 160 ms Record modes Track-at-once (TAO) Yes Disc-at-once (DAO) Yes Session-at-once (SAO) Yes Packet writing Yes Sequential writing Yes