Left corner alignment for easy system attachment Convenient eject button for one-step system removal Six USB 2.0 ports Multiple video ports: 1 VGA monitor, 2 DVI, 2 DisplayPort (Note that the video controller allows for any two video ports to be used simultaneously) Audio ports: Analog microphone in, headphone out e-SATA storage connector RJ-45 Ethernet port Integrated key lock and cable lock slot for physical security Ships with a 90W AC adapter Backed by a one-year warranty The ThinkPad Mini Dock Plus Series 3 is compatible with: ThinkPad L412, L420, L512, L520, T400s, T410, T410i, T410s, T410si, T420, T420s, T510, T510i, T520 Dual Core models, X220.