Product details:

Designed exclusively for ultraslim HP EliteBook. Expands display, network, and device connectivity, so you can be more productive throughout the day - all through a simple one-click slide-in side dock. Four USB 3.0 ports offer high-speed connectivity to the USB devices you use most. USB 3.0 reduces the time required for data transmission and is bidirectional and backward compatible with USB 2.0. DisplayPort and VGA ports deliver legacy and future compatibility with your choice of video devices, and the Ethernet/LAN port keeps you online.