Review on 📈 FOPO Triple Laptop Screen Extender - 12", Full HD 1920X1080P, 60Hz, Adjustable Stand, Portable, Low Blue Light, Multi-Angle Display, HDMI - S12 by Bruce Lucas

As the name suggests, these are technically two separate monitors simply connected by a bezel that fits over the laptop screen. So if you only have a few ports, consider buying a small KVM or HDMI port splitter. In addition, they need an individual diet. It's low power, but all along I just wanted to let you know that you need to schedule four connections.