Klang resembles three interlocking gears, with six teeth on the smaller two gears and eight teeth on the larger gear. The teeth of the smaller gears are a light gray, while their central regions are much darker. The teeth of the larger gear are a medium gray and its central region is darker. The left eye of the smaller gear is a white "X", while its right eye has a black pupil and a white sclera. It has a round green nose and a small mouth that is wide open. The large gear appears to have a face with a black square for its left eye, a black circle for its right eye, and a sharply angled white frown. Klang can fire tiny gears at high speeds in the form of Gear Grind and Shift Gear, its signature moves. When it gets angry, its gears rotate faster. Klang communicate with each other by spinning their gears in different directions.