R13 Size 12 Smart Ring: Heart rate detection
But wait, there's more! It's not just about health; it's about fun too. With a motion-sensing game and multiple sport modes, it turns fitness into a game (literally). And thanks to its waterproof (5ATM) design, you can wear it in the shower, pool, or even during that impromptu rain dance—no worries. Plus, with a working time of 3-5 days on a single charge, it's ready when you are, no constant charging required.
Compatible with Android 6.0 or above and iOS 11.0 or above, it syncs up with your phone smoother than your favorite playlist. So, whether you're team Android or iOS, you're good to go. Just strap it on, and let the data do the talking.
General specs
- Brand: R13
- Model: Size 12
- Seller: Sunsky
- Main Chip: OM6626A
- Bluetooth: 5.3
- Sensor chip: SC7A20H
- Heart rate sensor: HX3918
- Battery Capacity: 16mAh
- Working Time: 3-5 days
- Charging time: About 2H
- Waterproof: 5ATM
- Size: Dia 21.5mm; Perimeter 67.5mm
- Charging method: Magnetic charging
- Compatible system: Android6.0 or above, iOS11.0 or above
- APP: ECTRI
If you are interested in more details, you can find full information on the seller's page.
Shipping options
United States
Video Reviews
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
R13 Size 12 Heart rate detection
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Smart Ring Heart rate monitoring
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Fitness Tracker Ring Heart rate monitoring
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Smart Health Ring 24-hour heart rate monitoring
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Smart Fitness Tracker Ring
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Smart Ring Health Tracker Comprehensive health monitoring
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| Brand | R13 | Twievo | Hivisuals | Delcast | VNEXFU | |
| Model | Size 12 | R09 SIZE 9 | ||||
| Color | ||||||
| Rating |
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| Price | $14.50 | $15.41 | $39.99 | $45.99 | $55.99 | $29.99 |
| Seller | Sunsky | Sunsky | Amazon | Amazon | Amazon | Amazon |
| Update | August 2, 2025 | July 26, 2025 | July 18, 2025 | June 27, 2025 | July 20, 2025 | July 20, 2025 |
| Waterproof | 5ATM | 5ATM | IP68 | |||
