[email protected] RESOLUTION SUPPORTED | This updated HDMI switch supports HDTV deep colour, 4K resolution (3840x2160P) and 3D video. PLUG AND PLAY | No extra power required. The HDMI switch will obtain power automatically from the source devices through the HDMI ports. 3-PORT HDMI SWITCH | 3 HDMI ports in and 1 HDMI out for various HDMI devices. 3 HDMI source devices to be connected and manually selected to play, to avoid constantly plugging and unplugging. If you have any questions, please contact us, we can directly refund you, you do not need to return the goods. SILVER PLATE HDMI INPUT AND OUTPUT | silver plated connector resist corrosion, reduce tarnish and increase transmission performance.