To Add a user for the first time simply press the setting button and the blue light will flash. Then press your finger 5 times until the green light is always on, indicating success, the entry is completed and the setting is automatically exited.
For the second addition, simply press the setting button and the blue light will flash. Verify the administrator once. If the verification is successful, the blue light will be always on. Enter a new fingerprint and press the finger 5 times until the green light is always on, indicating success of operation.
To delete a fingerprint, simply press and hold the setting button for 9 seconds to observe the blue light flashing and the red light flashing after 9 seconds. Release the hand and the green light will appear indicating that the factory reset is successful.
Note: The first 3 fingerprints users are administrators while the fourth and subsequent fingerprints are ordinary users.