Domhong R03 Smart Ring: Heart rate and blood oxygen monitoring
For the active individual who wants to track health without a bulky device, the Domhong Smart Ring offers a discreet way to monitor your fitness and wellness. While many wearables focus on alerts, this ring provides peace of mind through continuous, silent tracking—ideal for checking your stress levels during a busy workday or monitoring your heart rate during a morning run.
Its sensors capture subtle changes, like a slight dip in blood oxygen during sleep, giving you actionable insights to improve rest. With no app subscription, you keep full access to your data, and the long battery life means it works for days without interruption. Use the remote control to take photos effortlessly, making it perfect for capturing moments hands-free.
Features
- No app subscription required
- 5ATM waterproof and IP68 rating
- Long battery life up to 7 days
- Multiple exercise modes tracking
- Remote control photography feature
- Heart rate and blood oxygen monitoring
General specs
- Brand: Domhong
- Model: R03
- Seller: Amazon
- ID: B0DZ2875TK
- Size: 9
- Battery Life: 5–7 d
- Water Resistance: 5ATM
- First listed by seller: 6/6/25
If you are interested in more details, you can find full information on the seller's page.
Buy on Amazon
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Price History for seller Amazon
Shipping options
Russia
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| Brand | Domhong | Gabit | DIYelecs | Automobile and motorcycle supplies | BUDAOLIU | BUDAOLIU |
| Model | R03 | Matte Silver Size-7 | Gold BT Sleep Fitness Tracker | BD-SM-R6 | BD-SM-R6 | |
| Color |
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| Price | $29.99 | $200.00 | $23.88 | $29.05 | $29.99 | $25.99 |
| Seller | Amazon | Amazon | Joom | Joom | Amazon | Amazon |
| Update | Mar 11, 2026 | Nov 9, 2025 | Feb 6, 2026 | Feb 6, 2026 | Jun 27, 2025 | Jun 27, 2025 |
| Size | 9 | 7 | 10 | 10, 11 | ||
| Battery Life | 5–7 d | 7–10 d | 5–7 d | |||
| Water Resistance | 5ATM | 5ATM | IP68 | |||
Domhong R03 Black Heart rate and blood oxygen monitoring
Reviews
Mathieu Gonzalez
June 8, 2025
Sledge
June 8, 2025
Bullet
June 8, 2025
Julien Fischer
June 8, 2025
Amelia Clark
June 8, 2025
Joseph Garcia
June 8, 2025