Battery Operated: Our pencil sharpeners can be powered by 2 AA batteries which could be convenient when you have no access to a outlet or adapter. Our pencil sharpener works great too by plugging in a adapter or outlet, which saves you the cost to get batteries and could be environment friendly Safe Sharpening: The helical blade protects pencil lead from breaking off and will not over-sharpen pencil lead or shorten your pencils. Suitable for various pencils including 2 pencils, colored pencils, charcoal pencils, etc. Large Shaving Box: Our pencil sharpener comes with large transparent shaving box which can hold quite a bunch of shavings. The shavings could be easily discarded by taking off the top cap