Apple Watch Series 12 GPS 46mm Space Gray Aluminum Case with Navy Blue Sport Band - M/L
An Apple wearable tracked at $439.99 at Amazon, with no separate list price published to measure it against.
Photos from the Walmart listing.
Why it stands out
- Heart rate sensing: HRV readings as often as every five minutes, plus background heart rate every five secondsfor stress and recovery insight
- Health tracking: Vitals app for overnight metrics, a daily sleep scoremenstrual cycle tracking and blood oxygen readings
- Safety: Detects a hard fall or severe car crashthen can connect you with emergency services and notify your contacts
- Battery: Up to 24 hours of normal useand 15 minutes of fast charging gives up to 12 hours
Key features
HRV readings as often as every five minutes, plus background heart rate every five seconds
Vitals app for overnight metrics, a daily sleep score
Analyses recent activity and vitals to help you judge whether to rest or push hard that day
Pacer, Heart Rate Zones and Workout Buddy powered by Apple Intelligence from a nearby iPhone
Detects a hard fall or severe car crash
Up to 24 hours of normal use
Siri AI handles natural back and forth conversation
Aluminum case with Ceramic Shield 2
Summarized from the Walmart listing and the manufacturer’s published data.
The Apple Watch Series 12 GPS 46mm Aluminum Case with Sport Band is a smartwatch that tracks heart rate, HRV, blood oxygen, sleep, menstrual cycle, and workouts, and includes safety features like fall and crash detection. It stands out for its frequent heart rate sensing, measuring HRV as often as every five minutes and taking background heart rate readings every five seconds, along with up to 24 hours of battery life and fast charging.
The Apple Watch Series 12 in a 46mm aluminum case suits anyone wanting serious heart, sleep and fitness tracking on the wrist without a daily charging habit.
What the listing puts on the page
The paragraph below is Amazon’s own sales copy. We keep it quoted and set apart rather than folded into our text, because marketing prose and a description are not the same thing, and because what it leaves out is as useful as what it claims.
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. Check your readiness for the day—Know when to rest or put yourself to the test.
What the number is worth
Amazon publishes a single figure for this configuration, $439.99, and no separate list price beside it. That removes the usual anchor, and it is the honest reason you will find no percentage anywhere on this page. The specification has to justify the money on its own.
The listing carries an end date of 29 October 2026. Retailers pull pages early and without warning, so read that as the outer edge rather than a promise.
The nearest things to it
The closest tracked listings in wearables are Apple Watch Series 11 [GPS 42mm] Smartwatch with Rose Gold Aluminum Case with Light Blush Sport Band - S/M at $331.55 and Apple Watch SE 3 [GPS 44mm] Smartwatch with Midnight Aluminum Case with Midnight Sport Band - M/L. Fitness and Sleep Trackers at $249.00. Both undercut it, so the case for paying more has to come from the table below rather than from the price.
These are the nearest listings by price that our tracker currently holds, not a survey of the market. Anything not listed on Amazon does not appear here at all.
The strongest reason to pick it is the heart health detail, with HRV captured as often as every five minutes and background readings every five seconds.
Wearables · Colossal Electronics
Full specifications
| Specification | Value |
|---|---|
| Color | Space Gray Aluminum Case with Navy Blue Sport Band |
| Watch band style | 46mm case + Medium/Large Sport Band |
| Edition | GPS |
| GPS GPS | GPS + Cellular GPS + Cellular |
From the specification table on the Walmart listing, read 8 October 2026.
Against the alternatives
| This listing | Apple Watch Series 11 [GPS 42mm] Smartwatch… | Apple Watch SE 3 [GPS 44mm] Smartwatch with… | |
|---|---|---|---|
| Amazon price | $439.99 | $331.55 | $249.00 |
| List price | Not shown | Not shown | $279.00 |
| Discount | None | None | −11% |
| Brand | Apple | Apple | Not listed |
| Model | MJEJ4LS/A | MEU04LW/A | MJL94LW/A |
The nearest live wearableslistings on this site by price. All figures are Amazon’s own, read when each listing was last checked.
What works
- HRV readings as often as every five minutes, plus background heart rate every five seconds: for stress and recovery insight
- Vitals app for overnight metrics, a daily sleep score: menstrual cycle tracking and blood oxygen readings
- Detects a hard fall or severe car crash: then can connect you with emergency services and notify your contacts
- Up to 24 hours of normal use: and 15 minutes of fast charging gives up to 12 hours
- Siri AI handles natural back and forth conversation: and Audio Intelligence catches and summarises what you missed
What to weigh
- Stock was not confirmed at Amazon when the listing was last checked
- Amazon publishes no separate list price for this configuration, so the size of the saving cannot be verified
- The listing is dated to end 29 October 2026
- No buyer rating was published on the listing at the time it was read, so there is no owner feedback to weigh
- Colossal Electronics does not test products. Everything above comes from the listing, the manufacturer’s published data and generated summaries of them
Video reviews from other channels
Introducing the new Apple Watch Series 12: the most accurate heart rate sensing in a wearable (opens YouTube in a new tab)
Apple Watch Series 12 & Ultra 4 Hands-On: What’s New? (opens YouTube in a new tab)
Apple Watch Series 12 First Impressions: A Surprisingly Big Upgrade (opens YouTube in a new tab)Third-party videos about this model. Colossal Electronics has no relationship with these channels and does not endorse their conclusions.
Common questions
Amazon does not publish a separate list price for this configuration, so there is no percentage to compare against. $439.99 is the figure recorded on the listing when it was last checked.
It is read directly from the Amazon listing by our tracker, last on 12 October 2026, 02:24 ET. Prices change without notice. The figure on the retailer’s own page at the moment you buy is the one that applies.
Stock was not confirmed at Amazon when the listing was last read. It may have sold out, or the feed may simply not carry a stock flag for this item.
No. Every Colossal Electronics article is compiled from the retailer’s own listing, the manufacturer’s published data and generated summaries of that material. We do not perform hands-on testing, and no article on this site describes hands-on experience, because there is none.
Colossal Electronics earns a commission when a reader buys through a link on the site. The commission is paid by the retailer and does not change the price you pay. Products are selected automatically by the price tracker, so no retailer can buy coverage.
Apple Watch Series 12 GPS 46mm Space Gray Aluminum Case with Navy Blue Sport… · Amazon price as of 12 October 2026, 02:24 ET
More reviews
Apple Watch Series 11 [GPS 42mm] Smartwatch with Rose Gold Aluminum Case with Light Blush Sport Band - S/M
−11% off the list priceApple Watch SE 3 [GPS 44mm] Smartwatch with Midnight Aluminum Case with Midnight Sport Band - M/L. Fitness and Sleep Trackers, Heart Rate Monitor, Always-On Display, Water Resistant
−20% off the list price