Lock Screen Plugin is a very practical plugin. If you turned on this plugin and long press the "Back key", the system will lock screen the soon. It can liberation of the power button.

Usage:
1. Make sure that you have installed Espier Launcher v2.0.5 or above.
2. Download and install this plugin.
3. In the home screen of Espier Launder, tag Espier Hub icon, choose Launcher Plugins, and enable this plugin.