Electric pencil sharpener features patented, X-Acto fly-away cutter system that stops sharpening when pencil is sharp. Multiple-size pencil selector has positions for standard, beginner and triangular pencils. Shavings fall into a large transparent receptacle (550 cubic centimeters) so you don't have to empty as often. For your safety, SafeStart receptacle interlock switch shuts off the motor when receptacle cover is removed. AC motor with auto-reset thermal protection prevents overheating. SharpX Principal Electric Pencil Sharpener is also equipped with a shavings-full LED indicator, hardened-steel helical cutter and noise-isolating, suction cup feet.