Antimicrobial protected with Agion silver ion-based agent. XHC dual cutter technology for 75% faster* sharpening and 12x longer life. SharpStop automatically shuts motor off to prevent over-sharpening. SharpGlow illumination provides a visual indicator when sharpening is complete. Tool-free removable cutter cartridge for fast & easy cleaning or replacement. QuietSharp fan-cooled robust motor for continuous quiet stall-free operation. MagnaSafe tamper-proof safety switch shuts down motor when shavings tray is removed. One-hand easy turn 6-size selector dial, with TriWrite compatibility. Colored pencil compatible. High capacity easy clean shavings tray. Oversized base with suction cup feet for added stability. 7 Year Limited Warranty.