What is Samsung DeX feature in Galaxy Note8?

Samsung DeX is a service that allows you to use your smartphone like a computer by connecting the smartphone to an external display, such as a TV or monitor. You can use your smartphone’s features on a large screen conveniently by connecting an external display, keyboard, and mouse.

 
To use Samsung DeX feature, DeX Station(sold separately), Charger(TA), HDMI cable and Monitor are must-have peripherals. With the DeX Station, you can connect your smartphone to a TV or monitor to use its features on a wider screen. You can also connect with nearby devices, such as a keyboard or mouse. To activate DeX Station, charger is required.

DeX Station :

Multi-port dock for Samsung DeX feature Spec
1) 2 USB 2.0 ports(for wired keyboard / mouse)
2) 1 Ethernet
3) 1 HDMI Out
4) 1 USB type-C Power-in port for charging
5) Cooling Fan

NOTE : Cooling fan prevents overheating of the device and fan is designed with a 360-degree coverage from the edge of the upper part towards the center.