Specs of the model are not great, so I would recommend sticking with a single monitor and it would be powered from HDMI port directly through the internal Graphic card. These will the best performing option. Since your computer doesn't have a type C or TB port and also lacks a discrete GPU. if you want 2 monitors you will need either of these 2 . Your options are limited.  1. USB Dock : Dell D6000 would serve the purpose.  2. USB to HDMI Dongle : Much cheaper alternative,  but your single USB 3.0 port would be permanently occupied,  [IMAGE]   Both of the options above will use display link driver. Your Internal UHD graphic can only drive main laptop display or a display connected to HDMI port. DisplayLink is a technology that enables connecting additional monitors without adding internal graphics cards. You can call it a vertual graphic card driven by software.  Since it's software driven the performance is no great and if you are just planning to use the display for Basic needs (browsing, office work) go for it.  
Is it possible to use a docking station or KVM switch with my Inspiron 13-5379 2-in-1 laptop such that I can have two *extended* monitors (not just the same display mirrored to two monitors)? There is only one HDMI port on the laptop. I don't know if a single HDMI port can be used to support two monitors ... and whether my system supports it as well (the graphics on this laptop is Intel UHD 620). BTW, I'm running Linux Mint 20.2 on this system. I envision something like this ...                                          /=HDMI-------HDMI=[monitor] [Inspiron]=HDMI------HDMI=[KVM or docking station]                                        \=HDMI-------HDMI=[monitor]   It is not something I've tried before. I've always had a system with two separate video ports (e.g., 2 HDMI, or 1 HDMI & 1 DP; etc.) so it was a no brainer connecting two monitors.   [alternatively, I suppose I could get a USB 3-to-HDMI converter and connect a 2nd monitor directly to one of the laptop's USB 3 ports - though I'd prefer a kvm or docking station]
Two monitors possible? (Inspiron 13-5379 laptop, Intel UHD, single HDMI)