Do not use pattern, PIN or password lock is a huge security problem, but returning your PIN a hundred times a day to unlock your lockscreen can also be boring.
near the defined delay time , it will automatically reactivate your lockscreen , so no stranger can unlock your device and access your private data .
+ Slurried the requirement to re-enter pattern / PIN / password again after successfully unlocked
+ No lockscreen while connected to some WiFi network or Bluetooth devices
+ Delay time from the “Screen off ‘ or since ‘ Last unlock ‘
+ Quickly reactivate the lock through the Android notification bar or a widget
For More Info Google Play