Battery Powered Electric Eraser, This electric eraser is powered by 2 AAA batteries(Not included) and helps you release your hands while drawing and drafting. Simply push the button to remove the marks. Save your time, Two electric erase pens with two kinds of erasers, meet your different needs at the same time, no need to change the refill frequently. Electric Erasers with 2 Eraser Sizes, electric eraser includes 2 eraser holders to hold both φ2.3mm and φ5mm erasers. Use the bigger one to create thick highlights and the smaller one to erase tiny parts like hair. Ideal for artists and professionals.