The HDMI 4x1 Quad Multi-viewer is a high-performance device that displays four HD digital video signals on the same screen. It supports 4 HDMI inputs, 1 HDMI output, and seamless switching between the four channels. The device also features IR control and supports resolutions up to 1080P/60Hz. It is suitable for use in video surveillance, meeting halls, and other applications where multiple video signals need to be displayed simultaneously.