X-Acto® Teacherpro Blue Classroom Electric Pencil Sharpener, Powerful Heavy-Duty Motor With Auto Reset To Prevent Motor Overheating. Patented Smartstop Shuts Off Motor And Lights Up To Prevent Over-Sharpening. Extra Long Blade Life For Heavy Usage In Classroom Setting. Safestart Feature Prevents The Sharpener From Operating Unless The Extra-Large Receptacle Is In Place. Multiple Settings For A Variety Of Pencil Sizes. Manufacturer's 10-Year Limited Warranty.