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