This is a conversion adapter that allows you to extend the screen output of your computer. By connecting it to your computer via Type-C and connecting two monitors, you can work with a total of three screens: your computer and two monitors. I purchased this a week ago, but I didn't consider the number of Type-C ports for charging my computer and connecting peripherals, so I'm selling it because I bought a different product. Here's the product description from Amazon: USB C HDMI Adapter HDMI Type-C Dual HDMI Extended 2-Screen Output [4K@60Hz Video Output + Thunderbolt 3 Compatible] HDMI USB Converter Multi-Display Adapter 3-Screen USB Display Adapter HDMI Hub 2 Output HDMI Splitter Extended Mode Compatible with MacBook/Surface Go/Samsung/Other USB C Devices (Black) Thank you for looking.