关闭屏幕及锁定装置，而无需使用物理按钮。
Turns off the screen and lock the device without using the physical key.
It work without ROOT permission.
Very light.
ACTIVATION
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Once you install the application to enable it just go on the Android settings as follows:
1) Settings \ Security \ Administrators Device
2) Select the app "Screen Off" and press the ACTIVE button
OFF AND UNISTALL
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In order to uninstall the application, proceed as follows from the Android settings menu:
1) Settings \ Security \ Administrators Device
2) Select the app "Screen Off" and press the DISACTIVE button
3) Remove application (as per standard procedure ....)