Thank you for your answer. Now I connected my PC to output 1, monitor to output 2 and speaker to output 3, while my modem is connected to main outlet ( at the wall) , because I don't have extension chord. But what about a "bypass"..can I use it to plug in my modem? what's the use of bypass?Option: PC to 1 output, Monitor to 2 output, and modem and speaker to a Multiple Outlet Extension Cord connected to Output 3.