UMHA-4 is a simple-to-use 4 Ports VGA KVM Switch with Two-way Audio, which allows users to share one set of keyboard, mouse, monitor, and 3.5mm analog Audio among four VGA computers. You can easily switch 4 computers using the user friendly hotkey control function or push buttons of the KVM switch. Real-time USB HID ports provide you amazing seamless HID switching experience.