Automatic constant speed sharpening, electric knife sharpener equipped with high-speed motor, only need 10 seconds to sharpen the knife. The grinding wheel assembly adopts precision grinding bearings, which can run more smoothly and have a longer service life. USB power supply design, stable current, with protective cover, which can effectively prevent metal chips from splashing and hurting people during the sharpening process. suitable for all kinds of knives, sharpening straight edges, including kitchen knives, household knives, sports knives and pocket knives, steak knives, pocket knives, scissors and other tools