The PowerCenter MDP 650 6-Outlet Surge Suppressor has a special GreenPower Outlet Management system that works automatically to eliminate energy waste in connected PC systems. Users simply plug their computer into the GreenPower Control outlet, then plug their additional connected PC peripherals (printer, monitor, scanner, loudspeakers, etc.) into the specially marked Monster GreenPower Controlled outlets. When the computer is turned off or goes to sleep, the other GreenPower outlets automatically switch off, eliminating the energy wasted by peripheral components when they're not in use. When the computer turns back on, the GreenPower outlets automatically power the peripherals up again.