The VS481B 4-Port HDMI Switch allows you to quickly connect 4 HDMI sources to your HDMI display and easily switch between them via front panel pushbuttons RS-232 or IR remote control. The front panels LEDs indicate the source device selected for the display at a glance.&lt;br /&gt;&lt;br /&gt;The VS481B supports Ultra HD 4Kx2K the newest resolution for high definition displays; Auto Switching modes for auto port selection;Instant Switching for a smooth video transition between HDMI ports with increased efficiency; and features a built-in bi-directional RS-232 serial port that allows the switch to be controlled through a high-end controller PC and/or home automation/home theater software package.