Dell 36M9K USB 3.0 Ultra HD/4K Triple Display Docking Station D3100 EXCL PSU
3 x SuperSpeed USB 3.0 - 9 pin USB Type A. 1 x SuperSpeed USB 3.0 - 9 pin USB Type B. 2 x USB 2.0 - 4 pin USB Type A. 1 x audio - output - mini-phone 3.5 mm. 1 x display / video - DisplayPort - 20 pin DisplayPort.