Acer U301 Usb 3.0 Dock Dual Display Output Fast Data Transfer Usb Ports: 1 X Usb 3.1 Gen1 Type-B Port; Ufp (Connect To Laptop) 4 X Usb 2.0 Type-A Port (Back) And 2 X Usb 3.1 Gen 1 Type-A Port; Dfp (Front) Ethernet: 1 X Rj-45 Connector (Connect To Ethernet 10/100/1000 Mbps) Audio Jacks: 1 X 3.5Mm Audio (Headphone/Speaker Jack)