This Delock Audio/Video Switch is a manual bi-directional switch for connecting different audio/video devices, which offers two different applications. You can connect up to four audio/video devices to a monitor, TV or beamer etc. with audio/video input. At the touch of a button, you can select the device that is to play the analogue signal on the screen. You can connect an audio/video device to up to four screens and select at the touch of a button on which screen the analogue signal is to be displayed. (Simultaneous output on multiple screens is not possible) Technical Data https://elecena.pl/product/18445299/87637-switch-4-port-audio-video-manual-bidirect 2021-05-13 https://elecena.pl/product/18445299/87637-switch-4-port-audio-video-manual-bidirect 2025-02-08