The Gefen GTB-HD4K2K-441-BLK ToolBox 4×1 Switcher for HDMI is a compact and lightweight alternative to rack-mounted matrixes. It allows up to four Ultra High Definition 4K or 1080p Full HD sources to be routed to one Ultra HD display. Each Ultra Hi-Def source can be switched to the display using the front panel push-button control, the included IR remote, RS-232 serial control interface, or through IP, using Telnet, UDP, and the built-in web server interface. LED indicators on the top panel display the current switching status. This product features Fast Switching Technology (FST). FST is a Gefen firmware implementation for HDMI products.