How to change user code Press red reset button and buzzer will”DI DI”twice, the yellow light will be light on , now input your new 3-8 digit code and press”*” to confirm, now the buzzer will”DI DI” twice, your user code is changed successfully Electronic Safe Lock main feature How to set master code Press “00”twice and press the red reset button , now the buzzer will”DI DI”twice, the yellow light will be light on , now input your new 3-8 digit master code and press”*” to confirm, now the buzzer will”DI DI” twice, your master code is set successfully. How to open/close the buzzer Press “*633” and the buzzer will “DI DI” twice, now the buzzer is closed,there is no sound after you input codes. Press “*66” and the buzzer will “DI DI” twice, now the buzzer is opened. How to open Input 3-8 digit code and press”#” to confirm, now the green light will be light on, now turn your handle clockwise to open the safe