Newcomdigi Electric Eraser, Battery Operated Eraser with 20 Colorful Eraser Refills for Pencil and Charcoal Long-lasting & Refillable - Easy to remove and replace. Top-mounted on/off button is perfect for right and left-handed use; comfortable in hand Good Erasing Capability - Circular movement and strong motor allow you to erase targeted areas effectively and precisely. Compact and Lightweight - Offers precise control and ideal for drawing, drafting, architectural plans, arts and crafts, etc Easy Operation - Simple push of the button and a light touch are all that's required to remove marks Battery-powered Eraser, with 20 Eraser Refills,requires 2 AAA batteries (not included).