Apple Watch Series 12 GPS 46mm Black Aluminum Case with S/M Black Sport Band - MJEK4LS/A

Apple Watch MJEK4LS/A Series 12 GPS 46mm Black Aluminum Case with S/M Black Sport Band

A work of heart. The most accurate heart rate sensing in a wearable.¹

Meet Apple Watch Series 12. A powerful health and fitness tracker with high-frequency HRV readings for insights on stress and recovery, readiness, Workout app, Pacer, Workout Buddy,² Siri AI,³ and Audio Intelligence,⁴ and long battery life.

Features

• STAY CLOSER TO YOUR HEART HEALTH—The most accurate heart rate sensing in a wearable,¹ Series 12 now measures HRV as often as every five minutes for insights on stress and recovery, and takes background heart rate readings every five seconds.
• A FULL-FEATURED HEALTH TRACKER—Better understand your body with invaluable health insights. View your overnight health metrics with the Vitals app⁷ and get a daily sleep score, track your menstrual cycle,⁶ and take readings of your blood oxygen.⁸
• CHECK YOUR READINESS FOR THE DAY—Know when to rest or put yourself to the test. The readiness experience can help you determine your capacity to take on the day by analyzing your recent activity, vitals, and sleep.
• A POWERFUL FITNESS TRACKER—With advanced metrics and motivating features like Pacer, Heart Rate Zones, and Workout Buddy powered by Apple Intelligence from your nearby iPhone²—Series 12 helps you stay active, from running to hiking to strength training.
• KEEP HELP CLOSE AT HAND—A smartwatch that puts your safety first. Series 12 can detect a hard fall or severe car crash, automatically help connect you with emergency services, and notify your emergency contacts.⁹
• ENJOY ALL-DAY BATTERY LIFE—With up to 24 hours of normal use so you can do all the things you love for longer.¹⁰ And it only takes 15 minutes to fast-charge for up to 12 hours of normal use.¹¹
• SIRI AI AND AUDIO INTELLIGENCE—Using just your voice, engage in natural, back-and-forth conversations, brainstorm ideas, and more with Siri AI.³ Audio Intelligence helps catch what you missed and summarize conversations with Live Rewind and Siri Recap.⁴ Siri AI is rolling out in English. Some Audio Intelligence features coming in beta late 2026. Usage limits may apply.
• BUILT TO LAST—Apple Watch Series 12 aluminum cases now have Ceramic Shield 2—which is tougher than any smartwatch glass. Titanium and ceramic cases have a superdurable crack-resistant sapphire crystal display.
• STAY CONNECTED—Series 12 (GPS) works with your iPhone or Wi-Fi to keep you connected. Use your smartwatch to send a text, take a call, listen to music, use Siri, and get notifications.

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• Apple Watch Series 12 requires iPhone 11 or later with iOS 27 or later.
  
• ¹Based on Apple-conducted study of heart rate accuracy, August 2026. Visit apple.com/HRAccuracy.
  
• ²Requires a paired Apple Intelligence–enabled iPhone and Bluetooth headphones with device and Siri language set to English or Spanish (Mexico). To use Workout Buddy without your iPhone nearby, you must have a Wi-Fi or cellular connection. Some features may not be available in all regions or languages. For feature and language availability and system requirements, see support.apple.com/121115.
  
• ³Apple Intelligence is available with Siri and device language set to Chinese (Simplified), Chinese (Traditional), Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Spanish, Swedish, Turkish, or Vietnamese. Some features may not be available in all regions or languages. Some devices may not be available in all regions. Siri AI is available in beta in watchOS 27 and requires an Apple Intelligence–enabled device set to a supported language. Available in English to start. Siri AI will not be initially available in the EU on watchOS. Certain Apple Intelligence features that rely on server-side models are subject to daily usage limits, including but not limited to Siri AI. Daily limits may vary by feature, request complexity, system demand, system policies, and other factors. Expanded access to such features will be available for a fee in the future. Use of these features is subject to the Apple Intelligence Terms and Conditions. Learn more at apple.com/apple-intelligence.
  
• ⁴Audio Intelligence includes Live Rewind, Siri Recap, Sound Recognition, and faster Shazam and requires Apple Watch Series 12 or Apple Watch Ultra 4. Live Rewind and Siri Recap will be available in beta in late 2026 and require an Apple Intelligence–enabled iPhone 16 or later (excluding iPhone 16e). Will be available in English to start and will not initially be available in the EU. Certain Audio Intelligence features that rely on server-side models are subject to daily usage limits, including but not limited to Live Rewind and Siri Recap. For more information, visit support.apple.com/148354.
  
• ⁵Hypertension notifications are not intended for use by people under 22 years old, those who have been previously diagnosed with hypertension, or pregnant persons.
  
• ⁶The Cycle Tracking app should not be used for birth control or to diagnose a health condition. Cycle deviation notifications inclusive of perimenopause are for people 40 years old or older.
  
• ⁷The Vitals app is for wellness purposes only and not for medical use.
  
• ⁸The Blood Oxygen app is for wellness purposes only and not for medical use. Measurements are calculated and viewed on iPhone in the Health app. The Blood Oxygen app is available on Apple Watch Series 6 and later (excluding Apple Watch SE models) and all Apple Watch Ultra models.
  
• ⁹Emergency SOS requires a cellular connection or Wi-Fi calling with an internet connection from your Apple Watch or nearby iPhone. You can use cellular models of Apple Watch to make an emergency call in many locations, provided that cellular service is available. Some cellular networks may not accept an emergency call from your Apple Watch if your Apple Watch isn’t activated, if it isn’t compatible with or configured to operate on a particular cellular network, if it isn’t set up for cellular service, or if the cellular network does not support emergency calling over IMS. See support.apple.com/108374 and apple.com/watch/cellular for more information.
  
• ¹⁰Battery life varies by use and configuration. See apple.com/watch/battery for more information.
  
• ¹¹Testing conducted by Apple in July and August 2026 using preproduction Apple Watch Series 12 (GPS) and Apple Watch Series 12 (GPS + Cellular), each paired with an iPhone; all devices tested with prerelease software, preproduction Apple Watch Magnetic Fast Charger to USB-C Cable (Model A3277), and Apple 20W USB-C Power Adapter (Model A2305). Charge time varies with adapter, region, settings, initial battery levels, usage, and environmental factors; actual results will vary.
  
• ¹²Wireless service plan required for cellular service. Contact your service provider for more details. Connection may vary based on network availability. Check apple.com/watch/cellular for participating wireless carriers and eligibility. See support.apple.com/HT207578 for additional setup instructions.