JARLINK Electric Pencil Sharpener, Heavy-duty Helical Blade to Fast Sharpen, Auto Stop for No.2/Colored Pencils(6-8mm), USB/Battery Operated in School Classroom/Office/Home(USB/AC Adapter Included)Powerful MotorWith heavy duty and durable helical blade, fast sharpening for 5 10 seconds and auto stop working at a perfect point to protect pencil lead and dispose of the broken lead intelligently. Fit for sharpening #2 pencils, colored pencils, charcoal pencils, etc. Auto & Safety Features Automatically work when plugging the pencil into the shaving entrance. Auto stop working if finished or the lid is opened. 8mm diameters shaving entrance could