Review on 🖥️ Monoprice Blackbird 4k Up and Down Converter for Enhanced Resolutions: 720p@60Hz, 1080p@60Hz, 4K@30Hz, and 4K@60Hz by Christopher Sullivan

Does not limit the input resolution (maximum 720, 1080 etc. for a device that only recognizes a device with maximum resolution, such as on devices that do not have settings such as Android that limit only the properties of the output device In other words, if your Android device needs to programmatically output at a higher resolution than its native output, it will slow, slow, slow case, Stadia output on a device running Qualcom 865+ but with a 1080p screen ( One+8).If output via HDMI cable to 1080 TV is fast, then this is (very) no problems as usual.But if output via HDMI cable to 4k TV, then it became so slow and I thought maybe this device will allow meset the maximum input resolution, no, once you know its capabilities and limitations.