Dell USB 3.0 Ultra HD/4K Triple Display Docking Station (D3100), Black comes with wall plug for power. description: The Dell Docking Station - USB 3.0 connects your laptop to up to three additional monitors, various external devices and the Internet with a single cable. It features a convenient way to expand the capabilities of your portable PC and customize your desktop computing environment. This sleek, compact dock unlocks enhanced productivity and entertainment options with highspeed connectivity and support for Ultra HD 4K displays. It also includes three USB 3.0 ports, as well as two USB 2.0 connections, ensuring compatibility with a vast array of peripherals, such as external hard drives, printers and scanners. Moreover, it is a great choice for corporate environments with Wake-On-LAN and PXE boot (on selected platforms). in perfect condition. used for about a year and just don’t need it anymore. bought for the original price of $160 on amazon. now on sale for $100. but selling for $70 OBO.