With the Mobility Center Panel available for laptops running the Home Premium, Professional, Enterprise, and Ultimate editions of Windows 7, you can adjust your display brightness and volume, check your battery status, change your power settings, and turn your wireless on and off, among other tasks.
It's all in one place, so you don't need to go hunting around for settings when you move from your desk to a meeting or your home to the airport. (You might see different options depending on your hardware and PC manufacturer.)
The Windows Mobility Center can be accessed using 3 ways:
Press on your keyboard the Windows Logo Key + X.
Go to Start Menu > All Programs > Accessories > Windows Mobility Center.
Go to Control Panel, select the View Type by Small Icons, then search for Windows Mobility Center.