HDMI switch bi-directional The HDMI switch has a button at the top. With this button, you can easily switch 2 HDMI sources (computer, Xbox One, PS3) to 1 HDMI display (for example projector or HDTV); or connect 1 HDMI source to 2 displays. This means that the switch is bi-directional: The HDMI signal can be transmitted in any direction. Easy to use plug & play, no external power or driver required for this HDMI switch. Connection is only via HDMI cable. Tips for use: If your HDMI source device (such as XBox, PS4 Pro) supports 4K, please use an HDMI 2.0 cable to connect the HDMI 4K source device and HDMI switch and display as an HDMI 1.4 cable (or lower than HDMI 2.0) is not enough for 4K resolution (4096 x 2160). If your HDMI cable is not an HDMI 2.0 cable, you can adjust the resolution on your source device from 4K HDMI to 1080P (1920 x 1080) to match the specifications of your HDMI cable, or use the corresponding HDMI cable to connect. The HDMI switch box cannot ensure that two display devices work at the same time when you connect 1 HDMI source to 2 monitors. As the HDMI switch does not run power, please use the USB cable to turn on the TV stick when you connect the HDMI switch to the TV stick. Please note that when connected to 2 displays with different resolution, the HDMI switch will only send the lowest "shared" resolution to 2 displays. It cannot display 2 different resolutions as it cannot switch from high resolution to low resolution (1080p >720p). does not work) Enjoy the most luxurious video and audio. The HDMI connection box supports all types of video formats such as 3D, 1080p, resolution 4K, etc