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# Danalock V3 End to End operation

The “End-to-End Operation” feature is designed for door locks where turning the key from the outside doesn’t move the thumb turn or Danalock on the inside. In these cases, using the key to unlock the door won’t update the Danalock’s status.

By enabling this feature and calibrating the lock, the Danalock ensures it operates in the correct direction (lock or unlock) every time, regardless of the current lock status. Whenever you unlock using the app or Danapad, the lock automatically resets to the correct position and recalibrates itself for smooth operation.

See this video produced by Danalock for more visual guidance:
${youtube}[How an asynchronous Lock works with Danalock](29-D1XGoMSA)