HDMI KVM Switch Dual Monitor 2 Port 4K,4K@60Hz,USB 2.0,KVM Switches 2 PC 2 Monitor,HDMI 2.0,HDCP2.2,KVM SwitchHDMI ,Button Switch,with 4HDMI 2.0 and 2USB Cables. The prerequisite for this KVM to achieve dual-screen display is that each PC you connect to has the function of supporting two-screen or multi-screen display.It has nothing to do with KVM.
eBay