[Individual Switches + Master Control] Energy Saving Power Strip with USB by BESTEK, Surge Protector with 8-Outlet 6.6-Foot Extension Cord and 2 Auto USB Charging Ports,,, Imagine, before leaving work, you have to shut down the computer first, then the printer, and maybe you need to remove the phone charger in order to prevent damage. We recognize this problem, and want to do something to really solve it. For better power saving and easier operation, our dedicated engineers worked night and day to come up with the best solution. Finally, they provide us with the ideal “Smart Control” solution. You can turn the switch of the 7 regular outlets to “Switched” position, once the equipment that is plugged into the master control outlet is turned on (more than 20W), the controlled outlets will output electricity; then if you turn off the device that is plugged into the master control outlet (or less than 15W), the controlled outlets on “Switched” position will power-down.