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 "*" 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. aerial: wooden Voltage: 4.5V (3 x AA batteries, not included) Colour:As shown Material:wood Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * Piggy Bank Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.