Are you out of HDMI ports on your HDTV/monitor/projector?Want to reduce the mess of cables connected to it?The 3x1 HDMI Smart Switch with pigtail support will take care of these problems.It has 3 HDMI input sources to provide plug-and-play auto-sensing capabilities that automatically switch inputs when a signal is detected.A button to manually switch between the 3 sources is also integrated. Powered by Connected Devices No power adapter is needed to operate this switch, as long as connected devices provide sufficient power.HDMI cables have the ability to deliver power from connected sources. Supported HDMI Features Up to 1080p, HDCP 1.0/1.1, 12-bit Deep Color, 3D, and uncompressed/compressed audio formats are some of the new HDMI features supported on this switch. Gold Plated Connector The 24K gold plated connector on the 20 inch / 50 cm cable resists corrosion and reduces tarnishing. NOTE Automatic plug-and-forget detection only works correctly for devices that do not produce DC voltage to the HDMI port when powered off.Turning on one device gives it output priority over the other two devices.Output priority is given to the next device on the switch if the current output device is disabled.Make sure connected devices provide sufficient power to the switch.