Chengxixi 1 m HDMI Splitter 1 in 4 Out, 1x4 Power HDMI Splitter 4 Ports w/AC Adapter, 4Kx2K@30Hz 3D Full HD Distributor for PS4 Fire Stick HDTV  (Compatible with TV, Black, One Cable)

IMPORTANT 1: This is not a HDMI Switch,it's HDMI Splitter, it can't support switch the signal between devices. So pls plug your Computer/Laptop/...into input port, connect your TV/Projector into the output port, then connect the power adapter.|IMPORTANT 2: This HDMI Splitter CAN'T support Extend screen, ONLY can mirror or duplicate one signal to 4 TVs, Display the same contents. (Support A-AAAA mode, Can't support A-ABCD mode)|IMPORTANT 3:This HDMI splitter does not have a separate Audio interface; it will not produce sound unless the output device is connected to a TV or monitor with built-in speakers.|IMPORTANT 4: Please use 4K or higher quality cables to ensure stable transmission. Additionally, the maximum supported cable distance for input and output is 15 meters each. If the distance exceeds 15 meters, please use 8K fiber optic cables. We do not recommend using excessively long cables.|4K HDMI splitter 1 in 4 out: this hdmi splitter can mirror/duplicate 1 HDMI input source to 4 HD output monitor simultaneously