The HDMI KVM switch 4 port allows 4 computers to share one monitor and 4 USB 3.0 devices, enabling you to control 4 computers and one monitor directly with a single set of mouse and keyboard. Four USB 3.0 cables Set includes four USB 3.0 cables, no need to buy separately, very convenient! DC12V power supply The product requires the included DC12V power adapter to continuously power the product. LED power indicator The green power indicator under PC1 to PC4 clearly shows the active computer. DIXSG 4 Port HDMI KVM Switch for 1 Monitors 4 Computers 4K@60Hz, HDMI USB 3.0 KVM Switches, KVM Switch HDMI 4 in 1 Out for 4 PCs Sharing 1 Monitor and 4 USB 3.0 Devices with IR Remote Control