Review on 🔌 HDMI Splitter 4K@60Hz: avedio links 1 in 2 Out HDMI2.0b Splitter for Dual Monitors - Mirror Screens, HDCP2.2 Support, Full HD 1080P 3D by Kyle Rock

I confess I was a bit shocked when I plugged in the HDMI cables and it immediately started mirroring with no external power supply, too bad there's no documentation or Instructions gave why I need a 5V USB power supply and cable as it seems to work fine without an external power supply (maybe I just got lucky with my setup). The connecting line could mean that something could go wrong. I'm happy to report that my monitor (4k Dell UltraSharp) has no degradation in functionality or image sharpness and the mirrored display (Wacom Cintiq screen) looks nice and clear despite being downscaled to 1080p! Heck, zooming out looks better than using Windows Display Properties or the Nvidia Control Panel, no nasty blurring or anti-aliasing. unintuitively numbered. The TWO output is your original unscaled input, not output 1. Other than that, the display information and settings come easily over HDMI and report the correct screen. The color convinced me.