Galaxy S9/S9+: What is Samsung DeX feature?
Samsung DeX is a service that allows you to use your smartphone like a computer by connection the smartphone to an external display, such as a TV or monitor. You can use your smartphone's features on a large screen conveniently.
You can use the DeX Pad only on supported mobile devices running Android 8.0 or higher.
You can view the compatible device in the instruction section for the DeX Pad on the Samsung website.
For more information about using the DeX Pad, refer to the DeX Pad's user manual.
All accessories, including the DeX Pad, are sold separately.
When you connect the charger to the DeX Pad’s charger port(USB Type-C), be sure to use a USB Type-C cable. If you connect a Micro USB cable, the DeX Pad may malfunction or be damaged.