https://wccftech.com/samsung-dex-dual-monitor-support/

The Samsung DeX series was introduced with the release of the Galaxy S8+ and Galaxy S8 Plus, followed by the DeX Pad with the release of the Galaxy S9 and Galaxy S9 Plus. The Galaxy Tab S4 has been certified by the FCC, meaning that its announcement is imminent but Samsung is expected to roll out a feature that will give users the option to add another monitor while using the productivity-centered DeX accessory. After all, if you’re paying a premium for it, you deserve to get your money’s worth.

According to the latest info reported by Sammobile, the Samsung DeX will be compatible with the upcoming Galaxy Tab S4. The latest feature would make it the first ever tablet that is compatible with this accessory, thus giving users more options when it comes to tackling productivity. Additionally, the slate will gain the ability to act as a second monitor when it is connected to the DeX and thanks to the increased screen real estate, lots of users will find that the experience on a larger screen device to be worth it.