The Belt Immunity Equipment is a compact, wearable device designed with a sleek, metallic casing that features a pixel-art isometric aesthetic, consistent with Factorio's art style. Its form is geometric and symmetrical, with a small, rectangular main body and subtle embossed circuitry patterns that suggest its high-tech functionality. The device emits a faint, luminous blue glow from its edges, indicating its active state, and is finished with a matte, slightly weathered texture to blend into the industrial environment of the game.