Review on 🔌 6-Pack 4K HDMI Dummy Plug for Ethereum ETH ZEC BTC Mining - High-Resolution Virtual Monitor Emulator, Headless Display Adapter Supports up to 3840x2160@60Hz-1080@120Hz Graphics Acceleration by Douglas Davis

This is a niche product; I bought these because I need to remotely connect to Windows PCs that don't have a monitor attached. Microsoft updated Windows to disable monitor output when the computer doesn't recognize that a display is connected and some remote desktop programs aren't recognized as monitors - hence they are needed to trick the computer into believing that there is a monitor. They work fine. for me and does exactly what I expected with no hassles or software.