Upgrade Modules in Destiny 2 are small, high-tech devices with a sleek, futuristic design. They feature a compact, geometric shape with smooth, metallic surfaces and glowing blue energy cores that pulse softly. The outer casing is made of a polished metal with intricate engravings and subtle wear marks, indicating frequent use. The modules are designed to be easily held in one hand, with a slightly angular form that fits comfortably in the palm.