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💍 Own your health in stealth mode — style meets science.
The Oura Smart Ring 4 in Stealth combines cutting-edge biometric tracking with a sleek titanium design, offering up to 8 days of battery life and seamless Bluetooth connectivity to iOS and Android devices. It delivers precise insights into sleep, heart rate, activity, and women’s health, all wrapped in a discreet, comfortable wearable that fits perfectly thanks to its included sizing kit.
| ASIN | B0D9WVKRKS |
| Age Range Description | Adult |
| Band Material Type | Titanium |
| Battery Average Life | 8 days |
| Battery Cell Type | Lithium Polymer |
| Battery Charge Time | 80 minutes |
| Battery cell composition | Lithium Polymer |
| Best Sellers Rank | 447 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 2 in Wearable Tech Rings |
| Box Contents | Information Booklet, Oura Ring 4, Oura Ring 4 Charger, Quick Start Guide, USB-C Cable |
| Brand Name | OURA |
| Case Material Type | Titanium |
| Closure Type | Buckle |
| Colour | Stealth |
| Communication Feature | Bluetooth |
| Compatible Devices | Smartphone |
| Compatible Phone Models | Compatible with iOS and Android devices |
| Connectivity Technology | Bluetooth |
| Connectivity technology | Bluetooth |
| Country of Origin | Estonia |
| Customer Reviews | 4.2 out of 5 stars 8,661 Reviews |
| Display Type | No Display |
| EU Spare Part Availability Duration | 8 Days |
| GPS | No GPS |
| GPS Geotagging Functionality | No GPS |
| Human Interface Input | Unknown |
| Item Dimensions | 23 x 23 x 8 millimetres |
| Item Dimensions D x W x H | 8D x 23W x 8H millimetres |
| Item Weight | 0.18 Kilograms |
| Manufacturer | Oura |
| Metrics Measured | Heart Rate Monitor |
| Model Name | Oura Ring 4 - Stealth - Size 9 |
| Model Number | JZ90-54218-09 |
| Operating System | Sistema Operativo Proprietario |
| Operating system | Sistema Operativo Proprietario |
| Product Features | Sizing Kit |
| Product Warranty | 3 year manufacturer warranty |
| Shape | Round |
| Special feature | Sizing Kit |
| Style Name | Metallic |
| Supported Application | Oura App |
| Supported Satellite Navigation System | GPS |
| Target Audience | Unisex Adults |
| Unit Count | 1.0 count |
| Warranty Type | Lifetime |
| Water Resistance Depth | 100 Metres |
| Water Resistance Level | Water Resistant |
| Wearable Computer Type | Smart Ring |
| Wireless Compability | Bluetooth |
| Wireless Provider | Verizon |
| Wireless communication standard | Bluetooth |
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