The ThinkPad X3 Ultrabase allows easy cable management with an array of additional ports, so you can increase the functionality of your X31 series ThinkPad.
- An integrated modular bay supports optional Ultrabay 2000 and Ultrabay Plus options including the Ultrabay battery, Ultrabay CD-RW/DVD Combo III or keyboard-extending numeric keypad (requires Ultrabay Plus Device Carrier).
- Two built-in stereo speakers
- Easy cable management with standard ports including serial, parallel, keyboard/mouse, USB, external monitor, RJ-11, RJ-45 and power.
- Second battery support for up to 8 hours use