1. intelligent automatic switching. 3 input ports, when only one input port has signal, the channel is automatically selected. When there are signals from two or more input ports, the default order is input1-input2-input3, you can manually press the Select button to select one of them. 2) Good compatibility, support 1080P, suitable for DVD, STB, PS3, PC, DV, DLP video projector and other HDMI devices with HDMI interface. 3) Energy-saving design, no external power supply is not required. 4. small size (60mm*60mm*15mm), does not take up much space. 5) Status indicator, real-time understanding of the movement of each port. Input port indicator light, for the current selection of HDMI input port three HDMI input, one HDMI output