【First Rechargeable Electric Eraser】Built-in with 600mAh Li-ion battery, this electric eraser can be used for 600 times after charging. Stop wasting money to buy batteries. Start an economical and environmental erasing experience!.【Electric Eraser Kit with 2 Eraser Sizes】Our 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. The electric eraser kit comes with 1 USB Cable, 40 big refills, 100 small refills and 1 brush. Besides, there are 3 pack of spare rubber holders..【Big Comfortable Switch Design】 Instead of a large rectangular shape, this automatic eraser has an ergonomic design which is more comfortable to hold. The big comfortable switch is very sensitive. Simply push the button to remove the marks..【Strong Erasing Capability】Circular movement and strong motor allow you to erase targeted areas effectively and precisely. Only slight pressure and you will have huge power..【Rechargeable Electric Eraser】To satisfy your needs to use the electric eraser for a long time, we have a listing of eraser refills in our store, which is convenient for you to order.