ThinkPad X4 Dock

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ThinkPad X4 Dock, Type 2506 (250610U)

This is a proprietary docking station for models with a CS00 slim docking port.



  • 1x PS/2 (Mini-DIN 6, keyboard+mouse) port
  • 3x USB 2.0 (Type-A) port
  • 1x Modem (RJ-11) port
  • 1x Ethernet (RJ-45) port
  • 1x VGA-out (DE-15) port
  • 1x Parallel (DB-25, ECP/EPP/SPP) port
  • 1x Serial (DE-9, RS-232) port
  • 1x Ultrabay Slim slot1
  • 1x DC-in (barrel) socket
  • 2x Audio speaker (stereo)


  • 1x Proprietary key lock (secures the laptop to the dock)
  • 1x Kensington security lock slot


  1. This Ultrabay slot does not support the use of an Ultrabay battery.

Part numbers

  • 41V9187 (41V9188), 73P4530 (73P4523), 26R8536 (26R8343)

Models supporting this accessory