How to remove the optional Dock/UltraBase on Lenovo notebooks is as follows:

1. UltraBase for X200 and other models. First use the key to open the UltraBase's lock.

2. Press the side button so that the UltraBase indicator light is in the removable state.

3. Open the side wrench and the notebook can be removed.

4. For the miniDock of T400S and other models, unlock it first.

5. Press the left button to pop up.

Lenovo notebook refers to the portable laptop computer produced by Lenovo Group. Lenovo Group was founded in 1984 by the Institute of Computing Technology of the Chinese Academy of Sciences with an investment of 200,000 yuan and 11 scientific and technical personnel. Today, it has developed into a large enterprise group with diversified development in the information industry. Lenovo is headquartered in Raleigh (Purchase), USA, and has established a global R&D structure with three R&D bases in Beijing, China, Tokyo, Japan, and Raleigh, USA. Through Lenovo's own sales organization, Lenovo business partners and the alliance with IBM, the new Lenovo sales network spans the world.