General Instruction : 1.Install battery : Before operation, 4 pieces 1.5V alkaline battery is needed to install into the safe 2.Close door : Close the door and Input any code in your favor and press the button "#" for confirmation, then the safe screen shows "CLOSE", the door is closed. 3.Open door : Input the code you pre-set and press the button "#" for confirmation, then the safe screen shows "OPEN", the door is opened. 4. Note:1-8 digits personal code. Managing code has the function to open any pre-setted code for the safe. (Please keep them properly!).While the user code is not workable, managing code is the best way to operate and reset the user code. In case of you forget Managing code, you can open the safe by Emergency mechanical key.Functional and Technical Index Power Supply : DC6v, use of 4 pieces of No.5 AA batteries, with low voltage warning Battery Life: The door can be opened more than 10,000 times in normal state. Under low voltage warning, the door can still be opened 100 times more. Thickness of Steel Board Standard: Door 5mm, Wall 2mmSpecification: 6600series (applicable to notebook computer): H200×W420×D370mm, Weight 13kg Laptop type