Apple Watch Ultra 4 GPS + Cellular Smartwatch, 49mm, Black Titanium Case with Burgundy Alpine Loop, Small (MJC04LS/A)

Go farther with a rugged 49mm Apple Watch Ultra 4 that pairs GPS and cellular connectivity with a Black titanium case and a Burgundy Alpine Loop in S, creating an advanced sports smartwatch built for demanding workouts and everyday adventure. Multi-day battery performance supports extended use, including up to 45 hours of Max Extended Workout tracking, while a 15-minute fast charge provides up to 18 hours of use. Highly accurate heart rate sensing, HRV readings as often as every five minutes, background heart rate readings every five seconds, the Vitals app, daily sleep score, cycle tracking, blood oxygen readings, and a readiness score provide deeper insight into stress, recovery, sleep, and training capacity. Precision dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, and training load make this a powerful companion for distance running, triathlons, mountain biking, strength training, and more, while Siri AI and Audio Intelligence help make every day more effortless.