Upgraded Motor-10000 Sharpening Times: This heavy duty electric pencil sharpener is a must for teachers or anyone who has a heavy use on pencil sharpeners. With upgraded stronger motor, this electric pencil sharpener can sharpen over 10000 times in only 3-5 seconds with ease. You will get a sharp and beautiful pencil point each time. Please don't push the pencil too hard when sharpening, or it will make "hum" noise and not sharpen pencils. UL Listed Electric Pencil Sharpener: Our classroom pencil sharpener is UL listed and has no issues after sharpening 200 pencils at a time. It is faster, more durable and powerful than any other helical blade sharpeners due to its bigger and stronger helical blade and motor. This pencil sharpener is ideal for kids, teachers, students, engineers, children, artists, and anyone who needs a heavy duty pencil sharpener! Colored Pencil Sharpener: This professional pencil sharpener will start sharpening automatically when you insert a pencil. Take out the pencil when the motor sound changes and the resistance of sharpening decreases. Great for graphite and colored pencils within 6.5-8mm, such as Prismacolor Premiers, Derwent, Verithins, Faber-castell, Koh-I-Noor Progresso. Please note that it is not recommended to sharpen SOFT CORE pencils as it may cause jams in blade. Commercial Pencil Sharpener: High efficiency, fast speed and heavy use make it an industrial and commercial pencil sharpener. It has two safety features: stop working when the shavings box is removed or not closed tightly and stop sharpening when it is overheating . Non-skid food pads at the bottom make it more stable to sharpen. Electric Pencil Sharpener Plug in: This AFMAT electric pencil sharpener is easy to use. Just plug the sharpener into a 120V outlet and start to use. AFMAT Electric Heavy Duty Pencil Sharpener- 3 Times Longer Lifespan Than Other Electric Pencil Sharpeners