HOW TO USE: 1.INSERT HDMI MALE PORT INTO YOUR PC/COMPUTER/SOURCE DEVICE 2.INSERT OUTPUT DEVICE'S HDMI CABLE INTO THIS SPLITTER ONE BY ONE. Function: This product can operate as a signal router,you may have a TV in two separate rooms,you can have a TV on in one room and when you want to switch room and keep watching the TV,you just need to switch one TV off and switch the other TV on,and then the signal is routed to the TV in the other room. Ideal for connecting one HDMI compatible device (Such as, hd - dvd, blue - ray dvd, Xbox, xbox360, ps3, stb, notebook, HD TV )to two visual output devises (such as, HDTV, Monitor, etc.). (CAN'T RUN BOTH AT THE SAME TIME) Allow to connect HDMI devices that have Build-in HDMI ports, like HDTV, PlayStation 3, Upconvertor DVD Player, LCD Monitor and projectors. Gold_plated connectors for better signal transfer.Allow to connect HDMI devices that have Build-in HDMI ports, like HDTV, PlayStation 3, Upconvertor DVD Player, LCD Monitor and projectors.hdmi splitter 1 in 2 out 4k hdmi splitter