Oura JZ90-54217-09 Smart Ring: Accurate biometric tracking
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.
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
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
#publicidad
$349.00
Last price update: 7/18/25
Available to order
Shipping options
Delivery to 
United States
United States
Available
Comparison with similar products
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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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|
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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 | July 20, 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 | ||
Reviews
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Nicolas Baker
June 8, 2025
Serenity
June 4, 2025
Rita Brown
June 3, 2025
Noah Fischer
June 2, 2025