USB Cut-off disconnects devices connected from usb cable extension or usb port extension connecting to PC using the timer relay.
You can use this to disable your speaker, keyboard and mouse when the time is over. Piso Secure required this method to work.
You can use USB Extension Cable, USB Port Extension or Front Panel USB.
How will this work?
You need to peel off the cable and find the 5v wire (usually it is color red). After connect it to timer relay wires. Finish.