MULTI DAY BATTERY LIFE — Ultra 4 is a smartwatch with ultramarathon battery stamina, perfect for runners to go the distance — with up to 45 hours of Max Extended Workout tracking. And you can fast charge in just 15 minutes for up to 18 hours of use. STAY CLOSER TO YOUR HEART HEALTH—The most accurate heart rate sensing in a wearable, Ultra 4 now measures HRV as often as every five minutes for insights on stress and recovery, and background heart rate readings every five seconds. A FULL-FEATURED HEALTH TRACKER — Better understand your body with advanced health insights. View your overnight health metrics with the Vitals app and get a daily sleep score, track your menstrual cycle and take readings of your blood oxygen. CHECK YOUR READINESS FOR THE DAY — Know when to rest or put yourself to the test. The readiness experience gives you one clear score and can help you determine your capacity to take on the day by analysing your recent activity, vitals and sleep. ULTIMATE RUNNING AND WORKOUT COMPANION — A superior fitness tracker for distance running, triathlons, mountain biking, strength training and more. Ultra 4 has precision dual-frequency GPS, Pacer, Heart Rate Zones, Custom Workouts, training load and more. KEEP HELP CLOSE AT HAND — A smartwatch that puts your safety first. Ultra 4 can detect a hard fall or serious car crash. If you don’t have mobile service or Wi-Fi, built-in satellite communications let you text emergency services to get help. SIRI AI AND AUDIO INTELLIGENCE — Using just your voice, engage in natural, back and forth conversations, brainstorm ideas and more with Siri AI. Audio Intelligence helps catch what you missed and summarise conversations with Live Rewind and Siri Recap. Siri AI is rolling out in English. Some Audio Intelligence features coming in beta late 2026. Usage limits may apply. RUGGED AND READY TO GO — Ultra 4 is built for extreme environments with a tough titanium case and a strong sapphire crystal display. Water resistant up to 100m, this smartwatch is great for swimmers, divers and fans of high-speed water sports. THE FREEDOM OF CELLULAR — With just your smartwatch, you can take and make calls, stream music and podcasts, and listen with your AirPods — even without your iPhone. LEGAL DISCLAIMERS — This is a summary of the main product features. See below to learn more.
JoybuyBuilt for the extremes, the Apple Watch Ultra 4 GPS + Cellular with a 49mm titanium case and Sand Trail Loop (S/M) is the ultimate wearable for athletes and adventurers. Its exceptionally durable, lightweight natural titanium construction is paired with a comfortable, secure sand-colored Trail Loop for a perfect fit during any activity. Experience unprecedented multi-day battery life with over two days of normal use and up to 45 hours with Max Extended Workout tracking, supported by fast charging. It features the most accurate heart rate sensing available, measuring heart rate variability every five minutes and background heart rate every five seconds for profound health insights. Utilize the Vitals app, nightly sleep score, blood oxygen readings, and the essential Readiness Score to know precisely when to push or rest. Conquer any terrain with precision dual-frequency GPS and advanced workout metrics for running, triathlons, and more. Your safety is paramount with fall detection, crash detection, and lifesaving satellite communications for emergency texting where cellular service is unavailable. Command Siri AI for natural conversations and use Audio Intelligence to rewind and summarize audio. Stay connected independently with 5G/LTE for calls, texts, and music streaming directly from your wrist. This is the ultimate tool for those who demand peak performance, resilience, and intelligent support on every adventure.
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