Oura JZ90-54218-11 Smart Ring: Accurate biometric tracking
Meet the Oura Ring 4—your wrist's new best friend and the coolest upgrade in smart ring tech. Crafted from all-titanium, it's tough enough to handle your daily grind but gentle enough for even the most sensitive skin (no rash guarantees, but we're pretty confident). Thanks to Smart Sensing, it's like having a mini health lab on your finger, tracking everything from how well you slept last night to whether you're stressing over that deadline (we've all been there).
Forget charging every night; this bad boy lasts up to 8 days on a single charge. And with no screens or buzzes to distract you, it's all about keeping you in the moment. Plus, it plays nice with over 40 apps—Apple Health, Google Health Connect, Strava, you name it. Oh, and here's a sweet perk: it's HSA/FSA eligible, so your health investment just got smarter.
Before you jump in, though, grab the Oura Ring 4 Sizing Kit to make sure it fits just right (because one size does not fit all, despite what some socks claim). And yes, your first month of Oura Membership is on us, packed with insights to keep you on top of your health game.
- 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: JZ90-54218-11
- Seller: Amazon
- product_dimensions: 0.98 x 0.98 x 0.31 inches
- item_weight: 6.3 ounces
- batteries: 1 Lithium Polymer batteries required. (included)
- connectivity_technologies: Bluetooth
- gps: No GPS
- other_display_features: Wireless
- human_interface_input: Touchscreen
- 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
- First listed by seller: 7/19/25
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
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Oura JZ90-54218-11 Accurate biometric tracking
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| Brand | Oura | Oura | Oura | Oura | Oura | Oura |
| Model | JZ90-54218-11 | JZ90-54144-11 | JZ90-54217-10 | JZ90-54217-09 | JZ90-1003-06 | JZ90-1003-09 |
| Color | ||||||
| Rating |
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| Price | $399.00 | $349.00 | $349.00 | $349.00 | $199.00 | $199.00 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | July 19, 2025 | June 29, 2025 | August 5, 2025 | July 18, 2025 | June 27, 2025 | June 28, 2025 |
| product_dimensions | 0.98 x 0.98 x 0.31 inches | 1.1 x 1.1 x 0.28 inches | 1.06 x 1.06 x 0.28 inches | 1.02 x 1.02 x 0.28 inches | ||
| item_weight | 6.3 ounces | 6.7 ounces | 6.3 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 | ||
| human_interface_input | Touchscreen | Buttons | Buttons | |||
| 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 | ||
| special_features | Heart Rate Monitor, Stress Monitor | Heart Rate Monitor, Activity Tracker | Heart Rate Monitor, Activity Tracker | |||
Smart Ring
Ishaan Y.
Surat
July 25, 2025
I was skeptcial at first, thinking it might be just another gadget, but the reality is it's super useful. I expected it to be complicated, but setting it up was straightforward. It tracks my sleep and stress levels accurately, helping me stay on top of my fitness goals. With multiple kids, I need something low-maintenance, and this fits the bill. The membership cost is a downside, but the insights are worth it for now. Overall, it meets my needs well :)
- Pros: Super easy to set up and it lasts for days without needing a cahrge which is great for my busy life with kids. The material feels strong and doesn't irritate my skin at all. It works with all my health apps seamlessly, and getting that first month free was a nice bonus.