Green Computer Switch

Motivation
This thing goes between your power outlet and the extension cord to which all your computer gear is connected. The ecological dilemma is that you want to be able to switch on your computer conveniently by one switch, but most devices draw a standby power that can be between 1 and 10 W/device. This adds to your monthly bill.

Master/Slave extension cords or ones with switches are an alternative. However, after shutting down the PC is quite easy to forget to turn the switch, or there