Turns my phone into a desktop computer. in 'Dex' mode, however, not all apps on your phone will work. There is a setting called 'experimental' that you can activate to help apps work in Dex mode if they don't work in the normal Dex mode. Also, the 'free' version of Microsoft Office products I have on my Note 8 will not work in Dex mode unless you pay for Office through a subscription (or already have a subscription). As time goes on, Samsung will need to improve how apps operate in Dex mode. Hopefully more apps will be compatible and this will eventually become the computer you can carry in your pocket. At this point, however, it needs to mature. I love it enough to keep it, though. It also has USB ports that allow you to connect wireless keyboard, mouse and powered external drive. HDMI interface allows connection to TV or monitor. Ethernet port allows you to plug a wired cable into the nearest switch or wall jack (this will automatically disable wireless and 4G LTE, though).