(2) x USB 2.0 - 4 pin USB type A ¦ (1) x headphones - mini-phone stereo 3.5 mm ¦ (1) x microphone - mini-phone stereo 3.5 mm ¦ (4) x audio line-in - mini-phone stereo 3.5 mm ¦ (4) x HDMI input - 19 pin HDMI Type A ¦ (4) x HDMI output - 19 pin HDMI Type A ¦ (1) x DisplayPort output - 20 pin DisplayPort ¦ (1) x USB 3.0 - 9 pin USB Type A ¦ (2) x network - RJ-45 ¦ (1) x serial - 9 pin D-Sub (DB-9)