AMAZING HDMI dongle gives full remote VNC display size and quality for any remote connected monitor and forces the Mac to use the GPU rather than using the CPU. removes all VNC lag and improves performance massively! | the DTK Select resolutions up to 3840*2160 ,work fine with big sur beta 3 onwards increases the amount of work space available for development work | Accessing Multiple Screen Resolutions on a Macbook Pro Retina Using an HDMI Display Emulator,allowing to run a remote desktop in the spare room as a sever/general workhors | without a monitor is something like 640x400, which is too small to even interact with Windows. connected this display emulator and get 3840x1920 resolution now when remoting into the system! without a monitor is something like 640x400, which is too small to even interact with Windows. connected this display emulator and get 3840x1920 resolution now when remoting into the system! | no drivers or config needed download any software or configure the unraid server just plug in adjust resolution and connect .Works great as intended!built-in blue Light ,have any questions please contact us 24 hours . Absolute service to your satisfaction！