Antimicrobial protected with Agion silver ion-based agent. XHC cutter technology sharpens 70% faster* and lasts 10x longer. SharpStop shuts motor off to prevent over-sharpening & reduce noise. SharpGlow illumination lets user know when the pencil is sharpened. Tool-free removable cutter allows for easy cleaning or replacing. QuietSharp motor uses overload protection to prevent over-heating. MagnaSafe? safety switch stops motor when removing shavings tray. 6-size selector dial easily turns with one hand. Compatible with colored pencils and TriWrite pencils. Brushed metal case withstands classroom usage. High capacity easy clean shavings tray. 7 year limited warranty.