Here is a link to the PDF Instruction Manual
. I have also copied the instructions for resting the amount to zero:
To Reset Account To Zero:
Turn on the ATM Safe by inserting your ATM card into the slot and entering your PIN code.
• Press and hold the 1, 2, and 3 keys (Fig 8).
• The display will read, "Reset to zero?"
• Release the 1, 2, and 3 keys and then press the "e" key.
If the electronic functions of ATM Safe stops working, open the battery door
(see instructions "To Install Batteries") and locate the RESET button above the batteries.
Press once to reset. Note: Account balance will not reset to zero.