R13 SIZE 9 Smart Ring: Heart rate monitoring
Meet the R13 SIZE 9 Smart Ring—your new wrist's best friend, but for your finger. This isn't just any piece of tech; it's like having a mini health lab right there on your hand. Sleek? Absolutely. Smart? You bet. It keeps tabs on your heart rate like a nosy neighbor (but in a good way), checks your blood oxygen levels to make sure you're not turning into a zombie, and even judges your sleep (no pressure). And for those who can't sit still, its motion sensing is so sharp, it could probably tell you're gaming or working out before you do. Whether you're a health nut, a gaming fiend, or just someone who loves cool gadgets, this ring slips into your life like it was always meant to be there.
Features
- Blood oxygen monitoring
- Sleep tracking
- Motion sensing
- Game control
- Heart rate monitoring
General specs
- Brand: R13
- Model: SIZE 9
- Seller: Sunsky
- ID: 3893632
- Functions: Heart Rate Monitoring, Blood Oxygen Monitoring, Sleep Tracking, Motion Sensing, Game Control
- Compatibility: Smartphones
- First listed by seller: 7/23/25
If you are interested in more details, you can find full information on the seller's page.
Shipping options
India
Video Reviews
Comparison with similar products
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R13 SIZE 9 Heart rate monitoring
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Blackview R30 Clear display
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| Brand | R13 | Blackview | ||||
| Model | SIZE 9 | ET475 | E800 | ET480 | ET570 | R30 |
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| Price | $14.50 | $60.70 | $50.07 | $50.58 | $50.58 | $29.99 |
| Seller | Sunsky | Banggood | Banggood | Banggood | Banggood | Blackview |
| Update | December 14, 2025 | December 9, 2025 | December 9, 2025 | December 9, 2025 | December 9, 2025 | April 18, 2025 |
| Bluetooth Version | 5.3 BLE | BLE5.0 | BT5.2 | BT5.0 | ||
| Compatible OS | Android 8.0 and above, Apple IOS 12.0 and above | Android 6.0 and above, Apple IOS 11.0 and above | Android 4.4 and above, Apple IOS 8.2 and above | Android 4.4 and above, Apple IOS 8.2 and above | ||
| Operating Mode | Full Touch | Full Touch | Full Touch | |||
| System Language | Chinese, Traditional Chinese, English, Japanese, Korean, Russian, German, Spanish, Italian, French, Portuguese, Polish, Czech | Chinese, English, Traditional, Japanese, French, German, Italy, Korean, Portuguese, Spanish, Polish, Russian | Chinese, English, Japanese, Russian, German, Spanish, Italian, French, Portuguese | |||
| Waterproof | IP68 | IP68 | IP68 | |||
| Screen Size | 1.49 inch | 1.43 inch | 1.96 inch | |||
| Material | AMOLED | AMOLED | IPS TFT | |||
| Resolution | 466*466 pixels | 466*466 pixels | 360x360 pixels | |||
| Battery Capacity | 350mAh | 300mAh | 340mAh | |||
| Standby Time | About 30-40 days | About 20-25 days | About 20 days | |||
