Oura JZ90-54217-09 Smart Ring: Accurate biometric tracking
Meet the Oura Ring 4—your new health sidekick, packed with the kind of tech that makes you feel like you've got a mini lab on your finger. It's not just smart; it's genius, tracking everything from how well you slept last night to whether your heart's doing the cha-cha correctly. And with over 30 biometrics under its belt (or should we say, around your finger?), it's like having a personal health coach that never clocks out.
Oh, and about that battery life? A whopping 8 days. Yeah, you heard that right. It's water-resistant, comfy enough to forget you're wearing it (until it reminds you to move, that is), and plays nice with over 40 apps. Apple Health, Google Health Connect, Strava—you name it, it's probably on the list.
Heads up: Don't skip the sizing kit. Because nothing says 'oops' like a ring that's either a makeshift bracelet or permanently stuck on your finger. Plus, your first month's membership is on the house—after that, it's your call: monthly or yearly, no pressure.
- Up to 8 days battery life
- All-titanium design
- Water resistant
- Syncs with 40+ apps
- HSA/FSA eligible
- Accurate biometric tracking
General specs
- Brand: Oura
- Model: JZ90-54217-09
- Seller: Amazon
- product_dimensions: 1.02 x 1.02 x 0.28 inches
- item_weight: 6.3 ounces
- batteries: 1 Lithium Polymer batteries required. (included)
- connectivity_technologies: Bluetooth
- special_features: Heart Rate Monitor, Activity Tracker
- human_interface_input: Buttons
- whats_in_the_box: Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide
- manufacturer: Oura
- country_of_origin: Estonia
- date_first_available: October 3, 2024
- ram_memory_installed_size: 512 KB
- First listed by seller: 5/29/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Shipping options
United States
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| Brand | Oura | Oura | Oura | Oura | Oura | Oura |
| Model | JZ90-54217-09 | JZ90-54217-10 | JZ90-54144-11 | JZ90-1003-09 | JZ90-54218-11 | JZ90-1003-06 |
| Color | ||||||
| Rating |
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| Price | $349.00 | $349.00 | $349.00 | $199.00 | $399.00 | $199.00 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | July 18, 2025 | August 5, 2025 | June 29, 2025 | June 28, 2025 | July 19, 2025 | June 27, 2025 |
| product_dimensions | 1.02 x 1.02 x 0.28 inches | 1.06 x 1.06 x 0.28 inches | 1.1 x 1.1 x 0.28 inches | 0.98 x 0.98 x 0.31 inches | ||
| item_weight | 6.3 ounces | 6.3 ounces | 6.7 ounces | 6.3 ounces | ||
| batteries | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | ||
| connectivity_technologies | Bluetooth | Bluetooth | Bluetooth | Bluetooth | ||
| special_features | Heart Rate Monitor, Activity Tracker | Heart Rate Monitor, Activity Tracker | Heart Rate Monitor, Stress Monitor | |||
| human_interface_input | Buttons | Buttons | Touchscreen | |||
| whats_in_the_box | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | Oura Ring 4, Oura Ring 4 Charger, USB Cable, Information Booklet, Quick Start Guide | ||
| manufacturer | Oura | Oura | Oura | Oura | ||
| country_of_origin | Estonia | Estonia | Estonia | Estonia | ||
| date_first_available | October 3, 2024 | October 3, 2024 | October 3, 2024 | October 3, 2024 | ||
Ethan D.
Marseille
June 6, 2025
as a sales manager who likes to research things thoroughly before buying i was quite impressed with this ring from oura it tracks a lot of health details like how i sleep and my heart rate which is handy for staying on top of my well-being without feeling overwhelmed the comfort is great i forget im wearing it most of the time and the long battery life means less fuss with charging a tip from me wear it consistently to get the most out of the data it collects but be ready for that ongoing cost after the free trial it seemed worth it to me for the insights it provides
- Pros: the battery lasts quite a long time as it seemed to me i only had to charge it once a week which is top-notch for something i wear all day it feels comfortable and light like its not even there and it works with a bunch of other apps i use for health stuff making it easy to keep track of everything