The B119-004-UHD 4-Port HDMI Switch allows you to connect four HDMI source devices to one port on an HDMI display and switch back and forth between them. For instance, you can connect a Blu-ray player, video game system, computer and cable/satellite DVR to one HDMI port on a monitor, projector or TV. Or you can connect up to four computers or media centers to a display for exhibiting digital signage or giving presentations. Connect your devices to the HDMI ports, and plug the included external power supply into an AC power source. A red LED indicates the unit is receiving power, and green LEDs indicate connected HDMI inputs. Switch between source devices using the unit's Select button or the included remote control. When the currently used device is powered off, the unit automatically switches to the next powered-on device. The B119-004-UHD ensures top-quality performance with Ultra High Definition (UHD) video resolutions up to 3840 x 2160 (4K x 2K) @ 60 Hz and 48-bit True Color (16 bits per channel), as well as DTS-HD, Dolby TrueHD and 7.1-channel surround sound audio. It's compatible with 3D, HDCP v2.2 and EDID. Plug-and-play functionality requires no software or drivers to download and install.