The easy， automatic way to sharpen most kitchen and sporting knives to a razor sharp edge. Professional 2-stage system precision grinds a perfect sharpening angle than fine hones and polishes the edge. Uses Sapphirite sharpening wheels， the same ultra hard material used in professional sharpening shops. No-guess blade guides automatically hold knife at the ideal sharpening angle every time. 1 year limited warranty. 60W/120V AC.