Mirror and Extend Mode Settings:

-- For MacOS, Top left corner Apple icon-->System Preferences-->Displays-->Mirror or Extend Displays;

-- For Windows 10, press Windows key + P combination command-->choose Duplicate or Extend.

-- For Windows system laptop, if the external monitor could not work, please update the BIOS and graphic card driver from laptop official website.

Stereo Settings:

-- For MacOS, Please go to Apple icon-->System Preferences-->Sound-->Output, choose your TV as the sound output.

-- For Windows 10, please click right bottom of your sound icon-->choose your TV as the sound output.

-- For Sony TV, if you are running MacOS, you probably need to go to Launchpad-->Other-->Audio MIDI Setup-->DisplayPort-->Output-->Please choose 2 ch 16-bit integer.

1.Supports HDMI resolution up to 4k*2K@30Hz

In order to enjoy the 4K high resolution, please make sure to use a 1.4 or higher version HDMI cable;Support VGA resolution up to 1080P@60Hz.

2.We recommend you to make sure your monitor or TV could supply corresponding output.

That means if your computer supports 4K@60Hz, while your monitor or TV only supports 1080p, you can only output 1080p rather than 4K.

3.If the resolution of your laptop is higher than the external monitor.

For windows:

Windows Menu--> Setting--> Display--> Advanced Display Settings, set your laptop's resolution same as or lower the resolution of external monitor.

For MacOS:

Left-upper Apple icon-->System Preferences-->Displays-->Mirror displays. Then your HDMI & VGA monitor would mirror your Mac. However here you have two choices. One is "Optimize For" your built-in Retina Display, the other is "Optimize For" your HDMI monitor. You can choose which one you like. White Black Space Gray Gold