Smart Biometric Fingerprint Handle Door Lock,Safely Convenient with Fingerprint Bluetooth APP Key Unlock for Home Office Apartment Hotel Garage School Wooden Door by Nyboer(White)

Simple OperationAdd or remove users at any time, up to 200 users.📌Extremely long battery life: 4 AAA batteries (not included in the box) for continuous use for half a year.📌Reset button: Open the cover of the back panel handle,long press the “reset” button for 5s ,and the initialization is complete.📌Add administrator: When the red and blue indicators are flashing, use the button to press the reset button, then press the fingerprint 3 times in succession while the red and blue indicators flash alternately.📌Add users:  Use the pin to press the reset button “ Di Di” 2 times  (the red and blue lights are on at the same time). Then use the administrator's fingerprint to verify once, the red and blue lights flash alternately , and press the new fingerprint 3 times continuously.📌Delete user: Use the pin to press the reset button and hold it for 5 seconds, then verify any registed fingerprint, and then it will delete all users.📌Fingerprint unlock:Press your finger on the fingerprint reader to unlock.Operation is successful: the buzzer beep once and blue light up;Operation is failed: the buzzer beep twice and red light up;Guarantee📌 Providing with a one-year warranty from the date of purchase.