Fast Sharpen: With a more powerful motor, this electric pencil sharpener sharpens quickly in 5-10 seconds and automatically stops working at the perfect point to protect pencil cores and intelligently handle broken pencil cores. It can sharpen almost all 8mm pencils, such as #2 pencils, colored pencils, charcoal and more.Auto Stop & Save Pencils: The colored pencil sharpener works automatically when inserting the pencil into the shaving entrance. Automatically stops working when finished or the lid is opened without over-sharpening, saving pencil lead. The 8mm-diameter shaving inlet keeps children's fingers out of harm's way.Electric Pencil Sharpener with Cord: This plug-in electric pencil sharpener can be powered by 4 AA batteries (Batteries NOT Included) or a USB cable. It is easy to carry and can be used anywhere. (Power Supply: input 100-240V, output 6.0V/1500mA or 4 AA alkaline batteries)Durable Pencil Sharpener: A mechanical pencil sharpener with a heavy-duty durable spiral blade that will sharpen your pencils over 3000 times. It's faster and more durable than ordinary electric pencil sharpeners.Easy to Clean: The blade of this classroom pencil sharpener is detachable, making it easy to clean up the shavings quickly. 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. Product Description Safety Design Automatically work when plug the pencil into the shaving and auto-stop working if finished or the lid is opened to prevent fingers being hurt. Heavy-duty Helical Blade Heavy duty and durable helical blade sharpened within 5 seconds and work well for 6-8mm diameters pencils, like No.2 pencils, colored pencils, charcoal pencils, etc. Does it not work at all? You could try to plug the USB cord into the AC Adaptor or laptop, power bank, wall charger adapter for charging. Test if it works well. Please check if reverse the polarity of batteries when using 2 AA batteries to charge. Will the pencil get jammed? Generally not, you could open the scrap box and clean up the broken lead. Because the blade is removable and detachable. More Electric Pencil Sharpener Options from JARLINK Pencil Diameter 6-8mm 6-8mm 6-12mm 6-8mm 6-12mm 6-8mm Feature Electric Electric Adjustable Pencil Nib Fast Sharpen Adjustable Pencil Nib Fast Sharpen Adjustable Pencil Nib N N N Power Source AC Adaptor/Batteries/USB AC Adaptor/USB AC Adaptor AC Adaptor AC Adaptor AC Adaptor Sharpening Time 3000+ 3000+ 8000+ 6000+ 8000+ 6000+