NEW APPLE Watch Ultra 4 Cellular - 49 mm Natural Titanium Case with Translucent Gray Ocean Loopπ±Built for athletes, adventurers and anyone who demands more from their smartwatch. Multi-day battery life, a rugged titanium case and a sapphire crystal display are ready for challenging environments. Precision dual-frequency GPS delivers highly accurate tracking, while the most accurate heart rate sensing in a wearable helps provide deeper insights into performance, stress and recovery. Advanced training features including Pacer, Heart Rate Zones, Custom Workouts and training load help you get more from every session. Plus, Siri AI and Audio Intelligence make it easier to stay connected and get things done throughout the day.