[Password piggy bank]-The default password is 0000, you can change it to another 4-digit password. If you forget the password, please remove the battery and reinstall it after 5 minutes. The password will be restored to "0000". Operated by 3 AA batteries (batteries not included).[Fun and Education]-With our amazing electronic piggy bank, teach your children to take care of their money! Easy to use and fun, this interactive savings bank is your child's first step towards financial independence.[Large capacity design] -19 * 13 * 12 cm (7.6 * 5.3 * 4.8 inches), weight: 660g (23 ounces). This ATM bank can store 600 coins or 100 banknotes. Currency banks can also be used to store toys, jewelry, baseball cards and other items.[Cash box material] The electronic money bank is a high-quality and environmentally friendly plastic material for children. It is an excellent gift for children on any occasion.[How to change the password] 1. Enter the password, the new default password is 0000. 2. Open the door. When the door opens, press and hold the STAR* button. 3. The indicator light will start to flash. (Press and hold the "*" button, don't loosen it). 4. Enter the required four-digit code within 15 seconds, and then press the NUMBER# button. 5. The indicator light will stop flashing. Now you can release the STAR* button.How to change the password1. Enter your code, the new default value is 0000.2. Open the door. When the door opens, press and hold the STAR* button.3. The indicator light will start to flash. (Press and hold the "*" button, don't loosen it).4. Enter the required four-digit code within 15 seconds, and then press the NUMBER# button.5. The indicator light will stop flashing. Now you can release the STAR* button.