Power Options overrides your top button functionality and gives you 2 more necessity options "clear cache, respiring & reboot". When you hold down your top button of your phone or iPod you will receive a custom graphic actions sheet that allows you to reboot, respiring or shut down your device. Keep a look out for PowerOptions Pro with more options and the ability to set your own buttons with this tweak. Enjoy this iDeviceDesign Product for free.