The Stealth Boy is a compact, wrist-mounted device with a sleek, retro-futuristic design. It features a metallic casing with a brushed finish, adorned with faint glowing blue circuitry patterns that pulse when activated. The device has a small, rectangular screen displaying a simple interface, and its form is slightly curved to fit comfortably around the wrist. The surface shows minor wear and tear, consistent with post-apocalyptic technology.