Uses a single USB-C port of your computer (Thunderbolt 3 compatible) to allow for multiple connections including 4K HDMI video output, requires DisplayPort Alternate mode over USB-C for HDMI video output. Adds four USB 3.0 ports (one with BC 1.2 fast charging 5V/1.5A), one HDMI port, one Gigabit Ethernet port, and one Audio jack for headphone or speaker connection. Supports USB Power Delivery up to 85W to power and charge MacBook, MacBook Pro, and other laptops. Aluminum mini upper chassis and fashionable colors-space grey to match modern designs and styles. Integrated power switch turns off the docking to conserve energy when not in use.