2x DisplayPorts; 2x DVI-D ports; 1x VGA port
6x USB 2.0 ports.
1x Analog microphone in; 1x Headphone out. 1x e-SATA storage connector. 1x RJ-45 Ethernet port
Integrated key lock and cable lock slot physically secures the ThinkPad system and ThinkPad Mini Dock Plus Series 3. Cable lock sold separately
Supported ThinkPads: L420, L520, T400s, T410, T410i, T410s, T410si, T420, T420i, T420s, T420si, T510, T510i, and X220. Thinkpad T520 and T520i Dual Core Models Only. ThinkPad L412 and L512 partially supported. See Description for complete compatibility