Erase Button: Tablet displays your writings/drawing until you erase them with the touch of a button. Battery Information: 1 x 1.5V Li Po Button Cell Battery (Included). Screen Size: 8.5inch. Lightweight, Slim in Size and Easy to Carry. CARE INSTRUCTION: Please check ON/OFF Erase button present at the back side of the tablet. Best Birthday Gift for Kids and Adults. A dust-free, non-toxic, inkless non-glare LCD writing tablet can replace the traditional blackboard. Save paper and trees.