Alien Forearm Cuff Device in Obsidian Metal

advanced extraterrestrial forearm cuff device, non-human alien technology, monolithic single-piece structure, 10-15 cm long along the forearm, wide armored cuff wrapping upper wrist and lower forearm, seamless continuous shell, no strap, no watch, no chronograph, no dial, no clock elements, integrated flush rectangular touchscreen embedded directly into the surface, display fused into the structure, unknown alien interface symbols visible on screen, smooth flowing asymmetric geometry, biomechanical exoskeleton aesthetic, dark obsidian metal with subtle iridescent reflections, matte black alien alloy, precision engraved micro-lines and energy conduits embedded into the surface, circular emitter nodes seamlessly integrated into the body, no exposed screws, no human industrial design cues, sculpted ergonomic curvature, isolated object, centered, front three-quarter view, neutral light gray background, soft even studio lighting, sharp focus, no depth of field blur, photorealistic, ultra detailed, product design render, not a wristwatch, not a smartwatch, not a wearable watch, no straps, no buckles, no traditional watch face