Introduction: This HDMI 4x1 Quad Multi-viewer is a high performance with four HD screen segmentation and seamless switching function switcher. It can display 4 Channel HD digital video signals on the same screen, and has a variety of video segmentation, seamless switching 4 HD input signal synchronously. The control methods of the switch is flexible, it can be switched via button and IR control. It's a very practical and stable switch and easy to install, can be used in the major projects, meeting halls and other places.