Okay, I give it 5 stars because it does what it promises technically. It duplicates monitors. However, if your monitors don't match, your image will revert to the lowest resolution. So I have a 32" monitor and a 40" 4K TV that serves as a second monitor. If only 4K or only 32 inches are used, there is no problem. The resolution is perfect for the monitor. Unfortunately, my computer doesn't support dual monitors, so this is my only option.
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