ClearkeyWater is a keyboard skin you can add to your selectable keyboard skins. It is available for Xperia POBox Touch 4 that is running on the Android version (firmware version) 2.3 phones. Downloaded skin are added as your keyboard skins. To set it to your keyboard, go to Settings > Language & keyboard > POBox Touch setting > Keyboard skin settings > Select keyboard skin. You can also press the tool key or touch and hold the text box to show the menu to go to POBoxTouch setting.