Fast Sharpen: This heavy-duty pencil sharpener has sharp helical-cut blades. It sharpens quickly and uniformly in 3-5 seconds and disposes of the broken lead intelligently. The tapered sides of the pencil tip are smoother to the touch not rough or splintered. Fit for sharpening #2 pencils, colored pencils, charcoal pencils, etc. Please do not push the pencil too hard during sharpening pencils, otherwise, it will make a humming noise, and will not make the pencil sharp..Durable and Multipurpose: The classroom pencil sharpener weighs 2.64 pounds. Due to the larger blade and more powerful motor, it is more durable than other ordinary pencil sharpeners and can sharpen 6000 times. Great for kids, artists, students, teachers, professors, engineers or architects to make drawing, writing and coloring easier..Safe Feature: Automatically work when plugging the pencil into the shaving entrance. Auto-stop working if the lid is opened. With overheating protection function, it will stop sharpening when overheated. 8mm diameters shaving entrance could prevent kids' fingers from entering to avoid hurting..Portable and Quiet: The automatic pencil sharpener is powered by an AC power cord. It is flexible and convenient to use anywhere and easy to carry around. The non-slip pad at the bottom can be firmly attached to your desktop, the pencil sharpener is not easy to move and helps to reduce noise during use..Easy to Empty: The large capacity shavings box can hold a lot of shavings waste and reduce cleaning times. You just open the cover of the reservoir to pour out the pencil shavings when finished, not adding too much trouble. Please contact JARLINK support if there are any problems during the use.