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.
Features
- 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
- ID: B0D9WWHXHH
- 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
Russia
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| Brand | Oura | POBOVi | VNEXFU | Weyrinice | UXOXU | |
| Model | JZ90-54218-11 | Ring OnePlus | ||||
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| Price | $399.00 | $119.00 | $29.99 | $5.88 | $79.99 | $29.97 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | Dec 6, 2025 | Dec 6, 2025 | Jul 20, 2025 | Dec 6, 2025 | Dec 6, 2025 | Nov 9, 2025 |
| Item Weight | 6.3 ounces | 0.25 Pounds | 3.2 ounces | 4 Grams | ||
| batteries | 1 Lithium Polymer batteries required. (included) | 1 A batteries required. (included) | 1 CR5 batteries required. (included) | |||
| Country of Origin | Estonia | China | China | |||
| Package Dimensions | 4 x 4 x 1.9 inches | 4.1 x 3.15 x 1.25 inches | 3.07 x 2.91 x 1.85 inches | |||
| Battery Life | 7 days | Up to 7-Day | 3-5 days normal use, Extendable to 60 days with charging case | |||
| Compatibility | iOS, Android | Bluetooth | iOS 9.0 and higher, Android 5.0 and higher | |||
