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Apple Watch Series 12 (GPS) 42mm Aluminum Case with Black Sport Band - S/M - Black - (2026)

Model: MJEA4LS/A
SKU: 6572728
Sold byBest Buy

About this product

Apple Watch Series 12 is a more powerful health and fitness tracker. Better understand your body with the most accurate heart rate sensing in a wearable, with high-frequency HRV readings for insights on stress and recovery, hypertension notifications, cycle tracking, and sleep score. Stay motivated with readiness, advanced workout metrics and features like Pacer, Heart Rate Zones, and more. And now every day is more effortless with Siri AI and Audio Intelligence.

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 second

  • 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.

Specifications

  • Screen Size
    42 millimeters
    Operating System Compatibility
    Apple iOS
    Operating System
    watchOS
    Built-in Storage
    64 gigabytes
    Global Positioning
    GPS, Galileo, GLONASS, QZSS
    Metrics Measured
    Altitude changes, Blood oxygen, Resting heart rate, Skin temperature, Water temperature, Electrocardiography (ECG), Duration of sleep stages, Duration of exercise, Hours slept
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Reviews

Rating 4.7 out of 5 stars with 20 reviews

95% would recommend to a friend

The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 4 out of 5 stars

    Apple Watch

    So it’s an Apple Watch. I had a series 4 and it’s basically the same thing BUT love the sleep data love the heart data and respiratory rate but it’s just an Apple Watch so if your not a fan of Apple Watches or don’t end up using it after buying it, then it’s not for you.

    Posted by Twin

  • Rated 5 out of 5 stars

    Absolutely GREAT

    If you are looking for a watch instrument that is better you can stop looking. I have had the opportunity to wear the best in time pieces for 38 years in transportation when time for movement was an absolute right up to the minute. This was for pocket watches only for many years then thru progress in time pieces the wrist time pieces were approved from a very limited number of manufacturers. This time piece equals and probably exceeds that standard. I love this time piece.

    Posted by KENDRITHN

  • Rated 5 out of 5 stars

    New HR algorithm worth it

    The series 12 have new Heart Rate and Heart Rate Variability sensing compared to previous models. This is a significant update for those who track exercise and sleep with their wearables. The battery life is noticeably improved as well. I would have traded in my series 10 but my oldest son needed one so he got it :-)

    Posted by Daddo

  • Rated 5 out of 5 stars

    Great upgrade from apple watch series 6.

    The Apple Watch Series 12 is fast, comfortable, and packed with useful features. The display is bright and crisp, fitness and health tracking are accurate, and it pairs seamlessly with my iPhone. Battery life easily gets me through the day. Highly recommend.

    Posted by Airpods

  • Rated 5 out of 5 stars

    Watch

    I love my Apple Watch! I had the first generation watch before this one. This one is so much faster and holds charge for a very long time. I love how big the text is as well

    Posted by MAGS

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Specs

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