Constructed for demanding environments. It's equipped with a robust QuietSharp fan cooled motor to provide continuous quiet operation and delivers 75% faster sharpening speeds. Skillfully, the SharpStop will automatically shut the sharpener down when sharpening is completed, followed by the SharpGlow illumination emitting a white light around the dial to provide a clear visual indicator when sharpening is complete. Built with our XHC dual cutter cartridge technology to provide more precise sharpening and features tool-free removal for quick and simple cleaning or replacement! Its conveniently colored pencil compatible and its 6-size dial accommodates numerous pencil sizes including Tri-Write. The high capacity shavings tray features our MagnaSafe tamper proof safety switch that shuts down the motor when the tray is removed for added protection. 7 year limited warranty.