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CNBRO Smart Ring Fitness Tracker 2
All-day fitness and health tracking with gesture control
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product.
Check Price on Amazon⚡ No monthly subscription fee listed
⚡⚡ Specification Summary: CNBRO Smart Ring Fitness Tracker 2
⚡ Specification Summary: CNBRO Smart Ring Fitness Tracker 2
CNBRO Smart Ring Fitness Tracker 2 offers a subscription-free hardware setup with $0 ongoing monthly software fees. Published specifications list up to 7-day battery life, Silicone, and 3g weight.
📋 Key Takeaways:
- ✓Rated Battery Life: Up to 7 days per charge cycle (80-minute full recharge).
- ✓Monthly Subscription: $0/month ($129.00 3-year total).
- ✓Durability & Sizing: IP68 water resistance with #8 to #11 sizing options.
All-day fitness and health tracking with gesture control
Check manufacturer sizing guidelines prior to ordering.
Advantages & Pros
- ✓24-hour heart rate tracking
- ✓IP68 waterproof rating
- ✓Multiple sport modes
Limitations & Cons
- ✕Battery capacity of only 18mAh
- ✕Mixed customer reviews (3.3 stars)
- ✕Charging case not universal
Form Factor & Resilience
| Materials | Silicone |
| Width / Thickness | 8mm wide / 2.8mm thick |
| Weight | 3g |
| Water Resistance | IP68 |
| Size Range | #8 to #11 |
| Sizing Kit Offered | ✕ No |
Power Architecture
| Battery Life | Up to 7 days |
| Charging Time | minutes |
| Charger Type | Magnetic Charging |
| Charging Case Included | ✓ Yes |
| Case Battery Capacity | + days |
Sensor Array & Biometrics
| Built-in Sensors | Heart Rate Monitor, Blood Pressure Monitor, Sleep Tracker, Pedometer |
| LED Optical Colors | Green LED, Red LED, Infrared Sensor |
| Stress Tracking | ✕ No |
| Cycle Prediction | ✕ No |
| Sleep Metrics | Sleep Duration |
Software & Ecosystem
| Companion App | ECTRI |
| Supported OS | iOS 11.0 and above, Android 6.0 and above |
| Apple Health Link | ✕ No |
| Google Connect Link | ✕ No |
| Offline Storage | Up to days |
| Bluetooth version | Bluetooth 5.1 |
Virtual Sizing Assistant
Convert your finger circumference to a standard US ring size. Smart ring brands may size differently from jewelers, so confirm with the manufacturer's sizing guide or sizing kit before buying.
Your Standard US Ring Size
Smart ring sizes vary by brand and model. Use this as a starting point and confirm your size with the manufacturer's sizing guide or sizing kit before ordering.
Sizing Decision Matrix (24-Hour Sizing Kit Rule)
Learn how to bypass sizing mismatches. Under the 24-Hour Sizing Kit Rule, users must wear a plastic sizing ring for a full day to capture natural biometric swelling cycles.
Do you own or have access to an official vendor sizing kit?
Frequently Asked Questions: CNBRO Smart Ring Fitness Tracker 2
Does the CNBRO Smart Ring Fitness Tracker 2 require a monthly subscription?
No. The CNBRO Smart Ring Fitness Tracker 2 is subscription-free ($0/month), so its 3-year total cost remains equal to its $129 hardware MSRP.
How long does the CNBRO Smart Ring Fitness Tracker 2 battery last?
Manufacturer specifications rate the CNBRO Smart Ring Fitness Tracker 2 for up to 7 days per charge, with a full recharge time of approximately 80 minutes.
What are the CNBRO Smart Ring Fitness Tracker 2 dimensions and water resistance?
The CNBRO Smart Ring Fitness Tracker 2 weighs 3g, measures 8mm wide by 2.8mm thick, is constructed from Silicone, and is rated for IP68.