Oura Ring 4 Silver Smart Ring - Size 8 with Sizing Kit - Sleep & Fitness Tracker
Meet the Oura Ring 4—your new health sidekick. It's not just a ring; it's like having a mini health lab on your finger, thanks to its Smart Sensing tech. Whether it's sleep, how ready you are to tackle the day, your activity levels, heart health, stress, or even women’s health insights, this little gadget’s got you covered.
And guess what? You can forget about charging it every other day. With up to 8 days of battery life, it’s the low-maintenance buddy you didn’t know you needed.
Slip it on and you might just forget it’s there—thanks to its all-titanium design that’s as tough as it is comfy. Day or night, it’s designed to stay out of your way while keeping tabs on your health.
When you unbox it, you’ll find: the Oura Ring 4 itself (obviously), a charger, a USB cable, some light reading (aka the information booklet), and a quick start guide to get you going without the headache.
Heads up: don’t skip the sizing kit. Trust me, sizing yourself with the Oura Ring 4 Sizing Kit before buying is the difference between 'meh' and 'wow' in comfort and fit.
General specs
- Brand: Oura
- Model: JZ90-54217-08
- Seller: Amazon
- Product Dimensions: 0.98 x 0.98 x 0.28 inches
- Item Weight: 6.7 ounces
- Batteries: 1 Lithium Polymer batteries required. (included)
- Connectivity Technologies: Bluetooth, USB
- Special Features: Heart Rate Monitor, Activity Tracker
- Manufacturer: Oura
- Country of Origin: Estonia
If you are interested in more details, you can find full information on the seller's page.
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Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Oura JZ90-54217-08 Silver
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Oura JZ90-54216-08
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Oura JZ90-51384-09
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Kuinha 008
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Ultrahuman RA-RT-Size14-US
|
Amwentu BJ02
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| Brand | Oura | Oura | Oura | Kuinha | Ultrahuman | Amwentu |
| Model | JZ90-54217-08 | JZ90-54216-08 | JZ90-51384-09 | 008 | RA-RT-Size14-US | BJ02 |
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| Price | $349.00 | $499.00 | $262.96 | $69.99 | $349.00 | $59.87 |
| Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 13, 2025 | May 12, 2025 | May 11, 2025 | May 13, 2025 | May 11, 2025 | May 13, 2025 |
| Product Dimensions | 0.98 x 0.98 x 0.28 inches | 0.87 x 0.87 x 0.28 inches | 0.94 x 0.94 x 0.31 inches | |||
| Item Weight | 6.7 ounces | 6.4 ounces | 7.8 ounces | 2.86 Grams | 2.39 ounces | |
| Batteries | 1 Lithium Polymer batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 Lithium Ion batteries required. (included) | 1 Lithium Polymer batteries required. (included) | 1 CR5 batteries required. | |
| Manufacturer | Oura | Oura | Oura | Ultrahuman Healthcare Pvt Ltd | Amwentu | |
| Country of Origin | Estonia | Estonia | Estonia | India | China | |
| Date First Available | October 3, 2024 | January 19, 2024 | July 11, 2024 | January 4, 2025 | ||
| Customer Reviews | 4.3 stars from 3228 reviews | 1236 ratings, 4.1 stars | 4.7 stars from 27 ratings | |||
Oura Ring 4 Smart Ring - Sleep Tracking Wearable - Heart Rate - Fitness Tracker
Reviews
Pearl
March 27, 2025
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March 27, 2025
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March 27, 2025
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