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  • Size: 9
  • 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

    • JZ90-54144-09
  • Product Dimensions (Open)

    • Dimensions In CM (WxDxH)

    • 0.79 x 0.79 x 0.28
    • Product Weight

    • 4.2 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

    • Heart Rate | Sleep Monitor
    • 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

    • 9
  • 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

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    Overview

    Enhanced Sleep Monitoring

    Designed to analyse total sleep duration, heart rate variability, nighttime movement, and sleep consistency, this Oura Ring 4 Size 9 Smart Ring delivers a detailed sleep score each morning. In addition, it provides a clear breakdown of deep, REM, and light sleep stages from the previous night. Hence, you can understand your rest patterns and make informed adjustments to your bedtime routine.


    Real-Time Health Intelligence

    Supporting 24/7 heart rate tracking, blood oxygen sensing, and temperature trend analysis, this size 9 smart ring delivers continuous body insights throughout the day and night. Features such as cardiovascular age, cardio capacity, and heart rate variability offer meaningful context about long-term heart health. Therefore, you can observe how lifestyle habits, stress levels, and recovery influence your overall wellbeing.


    Smart Readiness Tracking

    Featuring a daily Readiness Score, this ring evaluates sleep quality, heart rate trends, and temperature changes to indicate how prepared your body is for activity. As a result, you can plan workouts, work commitments, or rest periods based on personalised recovery feedback.


    Automatic Activity Detection

    Capable of recognising over 40 activities automatically, this smart ring tracks movement patterns alongside heart rate data. In addition, personalised activity goals adjust according to your recovery levels. Thus, you can maintain a balanced approach between daily movement and adequate rest.


    Stress and Resilience Insights

    Monitoring daytime stress, cumulative strain, and recovery signals, this ring highlights how your body responds to physical and mental demands. Hence, you can identify stress triggers and build resilience gradually through better recovery habits.


    Women’s Health Support

    Using temperature trends, this smart ring provides cycle insights and period predictions. Moreover, it integrates with compatible apps such as Natural Cycles and Clue through the Oura app. Therefore, you can track menstrual health data with synced and consistent updates.


    Smart Connectivity

    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 support, you can rely on uninterrupted tracking across daily routines.


    Reliable Water Resistance

    Designed with water resistance up to 100m, this smart ring supports use during workouts, showers, or swimming sessions. The durable construction withstands regular exposure to moisture, so you can continue tracking without removing the ring.


    Subtle Weight Design

    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 Design

    Made from titanium, this Oura ring offers a lightweight and streamlined profile suited for continuous wear. Its smooth structure sits comfortably on your finger, allowing you to wear it throughout work, rest, and activity with ease.

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