"Eco button is a discreet USB device that acts as a reminder and a prompt for you to press the ecobutton at every opportunity whenever your computer is going to be left idle, helping you save money and the environment. This could be from taking a phone call or break, to doing paperwork or going to lunch and meetings where otherwise the computer would normally be left on.
How does Eco button work?
When the Eco button is pressed your computer enters energy saving 'ecomode' – that's the most efficient, lowest power mode available, which actually draws only the same nominal power as when the computer and monitor are turned off! When you need to use the computer again, simply press any key to instantly return to where you left off. Easy!
There's even an on-screen meter which shows you exactly what's been saved in both power cost and carbon footprint, so you can monitor how well you're doing and feel pretty good about it too! Order yours today – whether it's two minutes, two hours or two days, one small click can make a huge difference."
Basicly It puts the machine in Hibernate mode :o)