BlackBerry Pockets do more than just protect your Blackberry! The BlackBerry Curve Pocket features built-in indentations that run along the inside of the case to protect the trackpad, and ensure your device is not accidentally activated. The BlackBerry Curve Pocket also has a built-in proximity sensor, so it knows when your BlackBerry® device is in place - and it automatically shuts off the screen in order to help maximize battery life. This technology also allows you to choose different notification settings for incoming calls, emails and other functions based on whether your device is in or out of the holster.