Don't worry, I'm not the type of person who doesn't understand what a product review is good for. I bought one of these for $6 or so. mine didn't work. The seller is well done, he returned the money, and I threw away the goods. Not feeling sure about ordering another one, I saw a few bucks more, like $10 so I could get a 4-way switch. I've only connected 2 computers to the same monitor, but this way I have options for the future. and I didn't actually have to rob a bank to do it. You don't give a single star in a product review because the product doesn't work. A lot of people don't understand that! I just don't understand this product when a 4 position switch costs quite a bit more money.
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review
Enhance Productivity with CKL HDMI KVM 2 Port 4K 30Hz Dual Monitor Extended Display (CKL-922HUA)
10 Review
TESmart 1080P 60Hz USB VGA KVM Extender Over Cat5e Cat6 Ethernet Cable - Long Range 984ft/300m (Sender+Receiver)
10 Review
CKL Quad Monitor HDMI KVM Switch 4 Port 4K@30Hz with Cables - Extended and Mirrored Display Support for Windows, Linux, and Mac
11 Review
Fractal Design Define R5 - ATX Mid Tower Computer Case - High Airflow and Silent Optimized - Includes 2x Dynamix GP-14 140mm Silent Fans - Water-Cooling Ready - Black
43 Review
Computer case AeroCool Cylon black
39 Review
Computer case be quiet! Pure Base 500 black
32 Review
MasterBox Q300L Micro-ATX Tower with Magnetic Dust Filter, Acrylic Side Panel, Adjustable I/O & Ventilated Airflow, in Black
40 Review