With electric power and diamond grinding wheels, this sharpens knives made of stainless steel, steel, ceramics, and other materials quickly and thoroughly. It has guide slots to maintain a consistent sharpening angle for easy sharpening. It features a safety switch that turns on when pressed and off when released, and an indicator lamp that clearly shows operation and battery power. It also has a shutter structure that prevents sharpening debris from flying out, and a built-in dust collection fan to prevent dust from scattering.