The 43R9148 - ThinkPad CD-RW/DVD-ROM Ultrabay Enhanced Drive (Serial ATA) is designed to easily install into the new native serial Ultrabay media bay found in selected ThinkPad systems such as the ThinkPad R400 and R500 Series. View DVD movies, record musica and data to inexpensive CD media, and install CD/DVD software with this optical drive option.