The Defender Capsule is a compact, high-tech device designed for automated defense in Factorio. It features a sleek, metallic casing with a slightly rounded, geometric shape, resembling a small, futuristic grenade. The surface is smooth with a glossy finish, adorned with subtle pixel-art patterns that indicate its function and readiness status. A distinctive LED ring at the top glows in a vibrant color, signaling its activation state, while the body is primarily a muted metallic hue with minor engraved details for aesthetic appeal.