This Delock switch can be used for connection of one USB device to 4 computer. You can connect e.g. a HDD, printer, scanner etc. to the switch. By using one of the 4 buttons you can manually select which device should be connected to the USB device. Specification https://elecena.pl/product/18493709/87634-switch-4x-usb-2-0-manual 2021-05-17 https://elecena.pl/product/18493709/87634-switch-4x-usb-2-0-manual 2022-01-07 https://elecena.pl/product/18493709/87634-switch-4x-usb-2-0-manual 2025-04-03 https://elecena.pl/product/18493709/87634-switch-4x-usb-2-0-manual 2026-03-04