This sharpener is suitable for all wooden and colored pencils with diameters of 6.5-8 mm, it is a perfect sharpener for children, artist and professional. Its compact design makes it ideal for any place, such as office, home and so on.Product Feature: 1.Multiple Power Sources: Powered by USB or AC or 4 AA batteries (not included), flexible and convenient to use anywhere and easy to carry around. 2.Safe: Works very carefully to ensure that their products are hazard free, employing all kinds of safety measures in place before releasing it to the masses. It also comes with a safety manual as to what all things need to be taken care of before using it. 3.Easy to operated: Just press the pencil into the sharpener; it will be sharpened within seconds. The sharpener can expel broken leads automatically because of the fast working helical blades. You can use the tool trouble-free. It also can be used for sharpening color pencils as well. 4.Steel blade cutter for precise sharpening: Unlike other sharpeners that produce lopsided pencil points with leftover wood, our high-quality pencil sharpener is designed and engineered exceptionally to produce exact, evenly-rounded points every time. It is the perfect electric pencil sharpener for the classroom, home or office. 5.Compact Design: The small size of electric pencil sharpener makes it convenient so you can carry it with you wherever you go. It is a light-weight sharpener; hence, it does not add burden to your package. It fits easily in your bag. It is a space saver as well because it demands little space on your desk. Warm Tips Please do not put your finger into the hole of the electric pencil sharpener; Please grip the pencil tightly when you put it into the electric pencil sharpener. Any product problem, please contact: support@bimonk.com, we will get back to you in 24 hours.