Always replace all of the batteries at the same time. If at any time the battery level is too low to operate the security safe, use the emergency access key. GUEST / USER CODE SETUP To reset the access code read and follow the steps below. 1) With the door open, enter a new 4-8 digits code and press the "#" key to confirm the new pass code. 2) You will hear and see the security lock engage and the word "CLOSE" will be displayed on the LCD screen. 3) Enter the new pass code and press the key