Handwriting Board Kids English Drawing Board Math Treasure Training Learning LCD Calculator Mental Arithmetic MachineHandwriting Board Kids English Drawing Board Math Treasure Training Learning LCD Spanish Calculator Mental Arithmetic Machine Description: Product Name: Children's Calculator Product material: ABS Memory capacity: no memory Product Category: Learning Machine Learning Computer Power supply mode: Built in battery(USB charging) Product function: rechargeable, music sound Packaging: color box packaging Ability training: intellectual development, interest