HDMI switchers provide users with a flexible way to apply them to high-definition home theater and electronic device systems. Plug and play, HDH-4:1HDMI switcher connects 4 HDMI sources, such as HDMI DVD system, and then connects the switcher's output to 1 HDMI display device. You can easily use the IR remote control to select the source you want to display on the display device. It can also be controlled via RS232. This is an effective and reliable solution that eliminates the need to buy multiple display devices, and the HDH-4:1HDMI switcher does not require additional power supplies to operate. Support HDMI1.4 3D, support HD resolution 3840X2160, support 3D video transmission, support 4KX2K video transmission, and comply with HDCP standard, support EDID read and write, support IR control, support automatic switching, support RS-232, support TCP-IP, WAP, IE control, metal chassis.