IBM UltraBase X4

The IBM UltraBase X4 is a portable dock for the X40 and X41 ThinkPads providing extra ports as well as a bay for an optical drive and a set of stereo speakers. Containing a full featured UltraBay Slim slot, it provides flexibility in drive choice as well as the option of a secondary battery for extended working time on the road. The UltraBase X4 doesn't provide a second docking port as the original UltraBase did, hence you can't dock the UltraBase to any of the other docking solutions.

Features

• Passthrough ports:
  • Ethernet (RJ45)
  • Modem (RJ11)
  • USB (three ports)
  • VGA
  • Serial (DB9-M)
  • Parallel (DB25-F)
  • Combined PS/2 Mouse + Keyboard
• Ultrabay Slim
• Stereo speakers
• Kensington security hole
• Fru Number: 92P3429
• Price: around 187 Euros

Pros & Cons

• Positives: Expansion capability, portable
• Negatives: makes the ThinkPad quite thick, no extra docking port, not compatible with the X41 Tablet
• Compatibility: X40, X41
• Warranty: Three Years