Use Tip 1 In splitter mode, only 1 of the 2 displays works at a time.
Use Tip 2 This HDMI Switch 4K can't switch automatically, ONLY by MANUALLY pressing the SELECT button.
Use Tip 3 For some input devices that run 4K@120hz, please lower the resolution to 4K@60hz.
Use Tip 4 It is recommended that the total length of HDMI cable is 3M if you need to get 4K@60hz video connections.
Use Tip 5 HDMI Cable is not included