The VS122HDMIU HDMI Auto Switcher lets you share a display between 2 consumer electronic devices or computers & prioritize your HDMI signals. The HDMI switch features a primary & secondary HDMI input port, & automatically defaults to the signal from the primary input port. If the signal connected to the primary input port is lost, the device automatically switches to display the signal from the secondary HDMI input port. Designed for maximum control & versatility, the HDMI Auto switch box also offers manual control of connected signals with easy-to-use front panel buttons that allow you to toggle between video sources.