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Key Features
Key Features
- Size: 14
- Sleep & Rest | Heart Health | Stress | Movement | Women’s Health | Metabolic
- Integrates with 40+ Apps | AI-powered Tools | Automatic Firmware Updates via Oura App
- Seamless Titanium Interior | Non-allergenic Titanium on Inner & Outer Surfaces
- Upto 8 Days Battery Life
- Water Resistant
- 2 Years Warranty
Specifications
Product Category
Ideal For
- Unisex
Wearable Device Type
- Smart Ring
Compatible Devices
- Smartphones
Device Connection Type
- Bluetooth
Manufacturer Details
Brand
- Oura
Model Series
- Ring 4
Model Number
- JZ90-54144-14
Product Dimensions (Open)
Dimensions In CM (WxDxH)
- 0.79 x 0.79 x 0.28
Product Weight
- 5 g
Dimensions In Inches (WxDxH)
- 0.31 x 0.31 x 0.11
Features & Functions
Smartphone Application Controls
- Automatic Firmware Updates Via Oura App, Integrates with 40+ Apps
Additional Features/Functions
- Track Over 50 Health and Wellness Metrics, Stress & Women’s Health, Readiness, EMF Safe, Supports Airplane Mode, Metabolic, Sleep & Rest
Health Tracker
- Sleep Monitor | Heart Rate
Features
- Sleep Monitor | Heart Rate
Sensors
- Red & Infrared LEDs Measure Blood Oxygen Levels, Green & Infrared LEDs Alternate to Measure Heart Rate & Heart Rate Variability 24/7 & Respiration Rate, Digital Sensor Measures Temperature Trends, Accelerometer Tracks Movement & Activity 24/7
Compatible OS
- Android OS | iOS
Touch Controls
- No
Physical Attributes
Ring Size
- 14
Network Connectivity
Bluetooth Specifications
- BLE
Bluetooth Supported
- Yes
Wi-Fi Supported
- No
Additional Features
Additional Technology Supported
- Smart Sensing Technology
Battery Details
Maximum Battery Life
- 8 Days
Standard Battery Life
- 5-8 Days
Charging
Wireless Charging Options
- Yes
Battery Charge Time
- Charges in 20 - 80 Minutes
Charging Pin Type
- Charging Dock
Materials & Durability
Resistance Type
- Water Resistant
Resistance Features
- Water Resistant up to 100m/328 ft
Body Material
- Titanium
Aesthetics
Brand Color
- Black
Color
- BLACK
In The Box
Documents
- 1 x Warranty Card
Main product
- Smart Ring
Accessories
- 1 x Charger, 1 x USB-C Cable
Package Includes
- 1 x Smart Ring, 1 x Charger, 1 x USB-C Cable, 1 x Warranty Card
Generic Name
- Smart Ring
Packaged Dimensions
After Sales & Services
Warranty on Main Product
- 24 Months
Warranty Type
- Carry-In
Standard Warranty Includes
- Manufacturing Defects
Standard Warranty Excludes
- Physical Damage
Installation & Demo applicable
- No
Certification
Additional Certifications
- FCC Certified
Company Contact Information
Customer Support Number
- 18005727662
Customer Support Email
- customersupport@croma.com
Manufacturer/Importer/Marketer Name & Address
- Manufacturer Name & Address: Valdmae poik 3, Tanassilma,76406 Saku vald, Estonia | Importer Name & Address: RASHI PERIPHERALS LIMITED Rashi Complex, Bldg.No.1,1A, 2 & 3, Survey No.186, Poman, Dist: Palghar, Maharashtra - 401208
Country of Origin
- Estonia
Country of Brand Origin
- Finland
Croma Service Promise
Customer Support Email
- customersupport@croma.com
Registered Name and Address
- Infiniti Retail Ltd. - Unit No. 701 & 702, 7th Floor, Kaledonia, Sahar Road, Andheri (East); Mumbai - 400069. India
Customer Support Number
- 1800 572 7662
Customer Care Contact Person
- Grievance Officer
Overview
Advanced Sleep Evaluation
Engineered to assess total sleep duration, heart rate variability, nighttime movement, and sleep consistency, this Oura Ring 4 Size 14 Smart Ring delivers a comprehensive sleep score every morning. In addition, it breaks down deep, REM, and light sleep stages for clearer understanding. Therefore, you can evaluate your rest patterns and make informed adjustments to your nightly routine.
Comprehensive Health Insights
Featuring 24/7 heart rate monitoring, blood oxygen sensing, and temperature trend measurement, this size 14 smart ring captures ongoing physiological data throughout the day and night. As a result, you can gain insight into how lifestyle habits and environmental factors influence your overall wellness. Metrics such as cardiovascular age, cardio capacity, and heart rate variability support long-term health awareness.
Daily Readiness Insights
Providing a personalised Readiness Score, this smart ring analyses sleep quality, heart rate, and body temperature trends to reflect your recovery level. Hence, you can decide whether to prioritise intense activity or restorative downtime based on your body’s signals.
Intelligent Activity Tracking
Supporting automatic detection of over 40 activities, this smart ring records movement along with heart rate data. Moreover, adaptive daily activity goals respond to your recovery status. Therefore, you can maintain a steady balance between movement and rest.
Daytime Stress Monitoring
Tracking stress levels, cumulative strain, and recovery responses, this ring highlights how your body reacts to daily demands. Thus, you can recognise patterns, understand triggers, and build resilience over time.
Cycle and Wellness Insights
Using temperature pattern analysis, this smart ring provides menstrual cycle insights and period predictions. In addition, it syncs with compatible apps such as Natural Cycles and Clue through the Oura app. Hence, you can monitor reproductive health data with consistent updates.
Seamless App Integration
Compatible with the Oura app on Android and iOS, this ring connects via Bluetooth BLE and supports automatic firmware updates. With 5-8 days of battery life and aeroplane mode availability, you can rely on uninterrupted tracking across daily routines.
Water-Ready Construction
Built with water resistance up to 100m, this smart ring supports use during workouts, showers, and swimming sessions. The resilient structure allows continuous wear without concern during regular water exposure.
Compact and Light
Weighing between 3.3g and 5.2g depending on the size, this smart ring maintains a light and steady presence on your finger. Its balanced design ensures comfortable extended use, allowing you to monitor your wellbeing consistently without interruption.
Refined Titanium Build
Constructed from titanium, this Oura Ring 4 Size 14 Smart Ring features a slim and lightweight profile for everyday comfort. Therefore, you can wear it throughout work, rest, and activity with a natural feel on your finger.








