Acer U301 USB 3.0 Dock Dual display output, Fast data transfer, USB Ports: 1 x USB 3.1 Gen1 Type B port, UFP, 4 x USB 2.0 Type A port and 2 x USB 3.1 Gen 1 Type A port, DFP, Ethernet 1 x RJ45 connector, Audio Jacks 1 x 3.5mm Audio