DC-in 1 (19V) Power on switch 1 Audio: headphone 1 Audio: microphone 1 USB 3.0 total 4 DisplayPort 2 (up to 2560 x 1600) - 1 DP (next to DVI) is shared with DVI, works when DVI not connected VGA 1 (up to 1920 x 1200) DVI 1 (up to 1920 x 1200) - shared with DP (next to DVI) - works when DP (next to DVI) not connected Ethernet (RJ-45) 1 (10/100/1000) Kensington Lock support 1 (Portrep & System) eSATA 1 Notes Port replicator supports 0-Watts functionality