Startech StarTech.com 4-Port Dual Monitor HDMI KVM Switch with Audio & USB 3.0 hub - 4K 30Hz - 4 PC Mac Computer KVM Switch Box for HDMI Display (SV431DHD4KU) - KVM / audio / USB switch - 4 x KVM / audio / USB - rack-mountable

This 4-port HDMI KVM switch lets you control four HDMI computers with a single mouse, keyboard and monitor up to 4K 30 Hz. The KVM also features 3.5 mm audio and a built-in 2-port USB 3.0 hub.

• Convenient and cost-effective USB 3.0 peripheral sharing
• Complete multimedia capability

• Convenient and cost-effective USB 3.0 peripheral sharing
  This 4-port KVM switch offers two USB 3.0 ports, as well as four HID keyboard and mouse ports, so you can share peripheral devices between each computer and avoid the cost of separate equipment. The USB 3.0 hub automatically switches your connected devices to the selected computer, saving you the hassle of disconnecting and reconnecting peripherals.
• Complete multimedia capability
  Along with dual video capability, this KVM switch features auxiliary 3.5 mm dual-channel bi-directional audio ports. This independent analog audio lets you share your analog audio devices such as speakers or a microphone between each of your connected computers, giving you complete multimedia control of your systems.

This 4-port HDMI KVM switch lets you control four HDMI computers with a single mouse, keyboard and monitor up to 4K 30 Hz. The KVM also features 3.5 mm audio and a built-in 2-port USB 3.0 hub.