4 Ports True 4K DisplayPort KVM Switch with USB 2.0, Two-way Audio, PAAG-114A
Amazon.com: KVM Switch HDMI 4K@60Hz for 4 Computers Share 1 Monitor, KVM Switch 4 Port with 4 USB 2.0 Ports Share Keyboard Mouse, Button Switch, Plug and Play, with 4 HDMI and 4 USB Cables… : Electronics
IOGEAR - GCS92HU - 2-Port 4K KVM Switch with HDMI, USB and Audio Connections
HDMI KVM Switch USB 2.0 Switcher for Printer Monitor Keyboard Mouse 2