Features and benefits:
- Left corner alignment for easy system attachment
- Convenient eject button for one-step system removal
- Six USB 2.0 ports
- Three video ports:
--Any two, of the three, video ports can be used simultaneously:
---ThinkPad systems with NVIDIA Optimus technology: ThinkPad display is enabled. For more information: NVIDIA Optimus - ThinkPad Multiple Monitor Configurations
---ThinkPad systems with integrated graphics, or other discrete graphics: Disables the ThinkPad display. The ThinkPad display is blank.
--VGA analog monitor supporting 1920 x 1200 resolution
--One Single-Link DVI-D digital monitor supporting 1920 x 1200 resolution
---Single-Link DVI-D port does not support attachment of a DVI-to-VGA monitor adapter.
--One DisplayPort monitor supporting 2560 x 1600 resoltion
---Supports attachment (compatibility varies by ThinkPad system) of DisplayPort monitor cables; Using DisplayPort monitor cables reduces resolution to 1920 x 1200
- Audio ports*: Analog microphone in, headphone out
- RJ-45 Ethernet port

ThinkPad L412*, L512*, L420, L520
ThinkPad T400s, T410, T410i, T410s, T410si, T420, T420i, T420s, T420si, T510, T510i
ThinkPad T520, T520i
ThinkPad X220