ADDERView desktop multi-viewer switch, provides simultaneous, real-time UHD 4K (3840 x 2160) KVMA (Keyboard, Video, Mouse and Audio) access of up to four computers from a single workstation. Innovative hybrid DisplayPort™ and HDMI® input ports for flexible connectivity from a single unit. Directly connect a single workstation to four video, audio and USB sources. 

See the Demo here

Find out more about the CCS-MV here