This HDMI switch by Delock is a manual bidirectional switch for connecting different devices with HDMI port. This switch offers two different applications.1.Up to 2 devices can be connected to a monitor, TV or projector. At the push of a button, the device that is displayed on the screen can be selected.2.An HDMI device can be connected to up to 2 screens. The screen on which the signal is displayed can be selected at the touch of a button. Simultaneous output to multiple screens is not possible.