ThinkPad Basic Dock
Front view
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Power button: Press the power button to turn on or turn off the computer .
Eject button: Press the eject button to release the computer from the docking station.
3Sliding adjuster: Use the sliding adjuster as a guide to align the docking station connector on your computer when you attach the docking station.
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Docking station connector: Used to attach your computer.
Rear view
1Always On USB connector: Used to connect devices that are compatible with USB 2.0 or charge some mobile digital devices and smartphones when your computer is in sleep or hibernation mode.
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USB 2.0 connectors: Used to connect devices that are compatible with USB 2.0.
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USB 3.0 connector: Used to connect devices that are compatible with USB 3.0.