When a single input port has a signal, the channel is automatically selected. When two or more input ports have signals, the input port that is powered on first is defaulted. You can manually press the Select button to select one of the input ports to be powered on.
1x 3-port HDMI Switcher
Xbox 360, Xbox One, PS3, PS4, PC/Laptop, DVD/Blue-Ray, Media Box, Cable Box ...