Amazon.com: TRENDnet 4-Port USB KVM Switch Kit, VGA and USB Connections, 2048 x 1536 Resolution, Cabling Included, Control Up to 4 Computers, Compliant with Window, Linux, and Mac OS, Black, TK-407K :
KVM Switch HDMI 4 Port Box, UHD 4K@30Hz & 3D & 1080P Supported, Downward Compatible with 4 USB-B and 4 HDMI Cables : Amazon.sg: Electronics
4 Port KVM Switch HDMI Dual Monitor Extended Display, 4K@30Hz 2 USB 2.0 Hub, Wireless Keyboard & Mouse and Hotkey Switch Supported, 4 in 2 Out, Powered by USB - China HDMI
4-Port 4K DisplayPort & Audio KVM Switch with USB 3.0 Hub | gofanco
4-Port HDMI KVM Switch - USB 3.0 - 1080p - KVM Switches | Server Management | StarTech.com Belgium
4-port USB Boundless KM Switch (Cables included) - CS724KM, ATEN Desktop KVM Switches | ATEN Corporate Headquarters
4 Port HDMI KVM Switch Support Max 4K@30Hz Input Using one Set of HDMI Monitor | LINOVISION US Store
4 Port HDMI KVM Switch 4K 60Hz w/USB Hub - KVM Switches | Server Management | StarTech.com Canada
IOGEAR - GCS1414TAA4C-UN - Universal 4-Port Single View DisplayPort/HDMI Secure KVM Switch Kit w/Audio and CAC Support