THE STARTECH.COM ADVANTAGE: StarTech.com offers a 2-year warranty and free lifetime technical support on this KVM Switch and has been the choice of IT professionals and businesses for over 30 years. 4 PORT USB KVM SWITCH WITH AUDIO: This 4-port HDMI KVM switch lets you control four HDMI computers with a single mouse, keyboard and monitor up to 4K 30Hz. The KVM also features 3.5mm mini jack audio. INTEGRATED USB 3.0 HUB: This 4-port KVM switch offers two USB 3.0 ports, as well as four HID keyboard and mouse ports, so you can easily share peripheral devices between each computer. UHD CAPABILITY: With support for ultra-high-definition 4K 30Hz resolutions, this 4-port KVM switch can drive dual HDMI displays, making it ideal for graphical applications requiring UHD capability. VERSATILE FUNCTIONALITY: Ideal for applications that require 2 displays at high resolutions across 4 computers. Great for those who need to share high-speed storage between up to 4 computers/desktops.