If you want to connect multiple computers together, you need a KVM switch. KVM stands for keyboard-mouse-video. You plug one monitor, mouse and keyboard into a KVM switch, and then you can run multiple computers from a single console with a KVM switch. What we have here is the MT-471UK 4 port USB 2.0 KVM switch box, which will help you to control 4 computers easily.The 4 port USB KVM switch is the simplest way to simultaneously run and share audio among four computers with a single USB keyboard, monitor and USB mouse. 4 port USB 2.0 KVM keyboard monitor VGA HDDB switch box allows you to easily network and share internet connectivity among connected computers while reducing the number of outlets and cables needed in the area - helping to preserve valuable work space. This KVM switch features the unique USB sniffing technology for USB mouse and keyboard emulation to ensure smooth operation. Designed in a compact size, this KVM switch is easy to use and store.This 4 port KVM switch can save you money, time, space, equipment and power. Controlling multiple PCs from one keyboard, mouse and VGA monitor. 4 port KVM switch is loaded with features such as hot-key, front panel push button and auto scan control. It has complete keyboard and mouse emulation for simultaneous PCs boot-up process. With this KVM switch, you can shift control from one computer to another easily instead of pile of lines. Just take this 4 port KVM switch home and you will be surprised by its great function.