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R21 Smart Ring with Heart Rate Blood Oxygen Sleep Tracking AI Health Monitor Waterproof Fitness Tracker

R21 Smart Ring with Heart Rate Blood Oxygen Sleep Tracking AI Health Monitor Waterproof Fitness Tracker

$59.00 USD
$59.00 USD
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✨ Why You’ll Love It

  • • Slim & Lightweight Design: Ultra-thin profile (2.3mm thickness) and light weight (2.7g), ensuring comfortable all-day wear without bulkiness.
  • • Comprehensive Health Monitoring: Tracks heart rate, blood oxygen (SpO2), body temperature, HRV, stress levels, and sleep quality for holistic health insights.
  • • AI-Powered Analysis: Utilizes cloud-based AI large models to provide personalized health data interpretation and recommendations.
  • • Smart Activity Tracking: Monitors steps, distance, calories burned, and supports multiple sports modes for fitness enthusiasts.
  • • Long Battery Life: Offers 5-7 days of typical usage on a single charge with quick magnetic charging capability.
  • • Waterproof Durability: Rated 5ATM waterproof, suitable for swimming and daily water exposure.
  • • Gesture Control & Remote Features: Supports gesture control for phone interactions, remote camera shutter, and device finding functions.
📏 Smart Ring Size Guide

How to Measure:

  1. Wrap a strip of paper or string around your finger.
  2. Mark where the ends meet.
  3. Measure the length in millimeters (mm).
  4. Find the closest match in the table below and select the corresponding US, UK, or EU size.
Finger Circum. (mm) US Size UK Size EU Size
52 mm6L½52
54 mm7N½54
57 mm8P½57
59 mm9R½59
62 mm10T½62
65 mm11V½65
67 mm12X½67
70 mm13Z½70
Example:
If your finger circumference measures 59 mm, select US Size 9.
Tip: If your measurement falls between two sizes, choose the larger size for a more comfortable fit.
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🔧 Specifications & 🎁 What’s Included

🔧 Specifications


  • Ring Sizes: Size 6 (16.5mm), Size 7 (17.3mm), Size 8 (18.1mm), Size 9 (18.9mm), Size 10 (19.8mm), Size 11 (20.6mm), Size 12 (21.4mm), Size 13 (22.2mm).
    Dimensions: Band width 6.08mm; Body thickness 2.3mm.
    Weight: Approx. 2.7g (Size 10).
    Material: Stainless Steel.
    Colors Available: Black, Silver, Champagne Gold, Rose Gold.
    Chipset: Nordic nRF 54L15.
    Memory: RAM 256KB, NVM 1.5MB.
    Sensors: Accelerometer (ST LIS2DOC), Heart Rate Sensor (Tianyi Hexin 3697), Body Temperature Sensor.
    Connectivity: Bluetooth 5.4 Low Energy.
    Battery Type: Polymer Lithium-ion.
    Battery Capacity: 16mAh (Sizes 8-13); 13mAh (Sizes 6-7).
    Charging Method: Magnetic Charging Dock.
    Charging Time: Approx. 1.5 hours.
    Usage Time: 5-7 days active use; 15 days standby.
    Waterproof Rating: 5ATM.
    Compatibility: Android 5.1+ and iOS 9.0+.
    App Name: QRing.
    Supported Languages: English, Chinese, Spanish, French, German, Italian, Japanese, Korean, Russian, Portuguese, Arabic, Hindi, Thai, Vietnamese, and more.
    HS Code Suggestion
    8517620000
     

🎁 What’s Included


  • smart ring*1magnetic charger*1user manual*1gift box*1

     
A small promise from us
We treat every order like it’s for ourselves — carefully checked, securely packed, and backed by real human support. If something isn’t right, we’ll make it right.
— The ZeeTec Team

💡 Item FAQ

If your item arrives damaged or defective, we will ship a replacement item to you for free. There is no need to return the original item, and you can continue using your other items while waiting for the replacement.
Contact our customer support via email info@zeetec.store or WhatsApp +96176016728 with your order number and a photo of the damaged or defective item. Our team will verify and ship the replacement promptly.
Yes, It covers software and troubleshooting support.
No! Shipping for all warranty replacements is completely free.
The item will ship from one of our warehouses located in Lebanon or Germany or China or USA.