... LED screen Opening: Two sets of password operation— 4-digit guest password/ 6-digit master password and ... input the personal code under opening situation) Install 4 AA batteries into the external battery case, plug in ... when press the button there will be a beep.4) Lock the doorPress “B”, the SET light on ... Under opening status, press “B” and input New 4 digit personal code when close the door, Press “B ...