Hdmi 4x1 quad multi-viewer is a high performance with four hd screen segmentation and seamless switching output switch. it can display 4hd digital video signal 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.