The HDMI switch is to connect more source devices to display on one screen (TV, projector or LED monitor). This switch with 3 input ports can connect 3 devices at the same time which can avoid frequent disconnection and reconnection. Save your time and money.
This HDMI switch is updated with 4K video transmission supported. HDTV deep color and 3D video are supported as well. You can enjoy high quality movie at home or build your own home theater.
No extra power cable is needed to make this switch work. As long as the connected devices supply sufficient power, the HDMI switch is capable to automatically obtain power from connected sources devices.