Features: Automatic rolling banknote,put paper money into the roll slot, it will automatically roll the it into the box. Also with a coin slot at the top of the box that provided to save all kinds of coins. Password design,make your 'property' more insurance,and the password is modifiable. There is warning sound when the door is opened and it will lock automatically when closed. Cultivate children's sense of saving money, learn to manage money. A good gift for children.  How to Use: Enter the four-digit passwords (default 0000), the green lights on, then rotate the knob clockwise to open the door. Change The Password:Press the " x " key to enter the password you want to change, press the" "key to end, If forgotten after the password is changed, you can remove the battery for half an hour to restore the factory default password 0000.  Specifications: Material: Plastic Voltage: 4.5V (3 x AA batteries, not included) Size: As Shown  Package included: 1 x Piggy Bank 1 x English Manual Note: Please allow1-2cm measuring deviation due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.