This unit has been professionally refurbished by HP. HP ULTRASLIM DOCK 2013 Quickly & easily expand your display network & device connectivity to customize an always-ready workspace with the HP 2013 Ultra Slim Docking Station a simple one-click slide-in side dock for select ultraslim HP Elite Book Notebook PCs. Get high-speed connectivity to the USB (Universal Serial Bus) devices you use most with four USB (Universal Serial Bus) 3.0 ports which reduce the time required for data transmission (vs. USB (Universal Serial Bus) 2.0) are backward compatible with USB (Universal Serial Bus) 2.0 & bi-directional. Enjoy legacy & future compatibility with your choice of video devices with two Display Port ports & one VGA port. Get online quickly with the Ethernet/LAN port. Line in & line out supports all of your audio needs. Get high-speed connectivity to the USB (Universal Serial Bus) devices you use most with four USB (Universal Serial Bus) 3.0 ports which reduce the time required for data transmission (vs. USB (Universal Serial Bus) 2.0) are backward compatible with USB (Universal Serial Bus) 2.0 & bi-directional. Secure the connected notebook to the dock with the optional HP Docking Station Cable Lock (sold separately). Enjoy the reassurance of a one-year parts replacement limited warranty. Additional support is available (North America only) seven days a week 24 hours a day by phone as well as through online support forums. Designed for Elite Book 720 G1 725 G2 745 G2 750 G1 755 G2 820 G1 820 G2 840 G1 840 G2 850 G1 850 G2; Elite Book Folio 1020 G1 1040 G1 1040 G2 9470m 9480m; Elite Book Revolve 810 G1 Tablet 810 G2 Tablet 810 G3 810 G3 Tablet; ZBook 14 Mobile Workstation 15u G2 Mobile Workstation 1 x 15-pin D-SUB4 x USB (Universal Serial Bus) 3.01 x RJ-451 x Line In Jack 1 x Audio Line-Out 2 x Display Port 1.1a..