R13 SIZE 13 Smart Ring: Heart rate detection
Ever wondered why you’re still tired after what felt like a full night’s sleep? The ring’s sleep monitoring function is here to spill the beans on your nighttime habits. But it’s not all serious business—there’s fun to be had with motion-sensing games and gesture interaction that’ll make you feel like a wizard. Plus, it plays nice with both Android (6.0 and up) and iOS (11.0 and up), syncing your data without a hitch.
Rain or shine, swim or shower, its 5ATM waterproof rating means it’s tough enough to handle whatever your day throws at it. And yes, it comes with all the essentials: the smart ring itself, a charging cable (because it’s not magic), a user manual (for those who read them), and the original box (for the unboxing enthusiasts).
General specs
- Model: R13 SIZE 13
- 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 22.3mm, Perimeter 70mm
- 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
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Smart Ring Heart rate detection
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| Brand | Delcast | HitTopss | Twievo | Delcast | ||
| Model | R13 SIZE 13 | R09 SIZE 9 | ||||
| Color | ||||||
| Rating |
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| Price | $14.50 | $15.41 | $55.99 | $29.99 | $39.99 | $55.99 |
| Seller | Sunsky | Sunsky | Amazon | Amazon | Amazon | Amazon |
| Update | August 2, 2025 | July 26, 2025 | July 20, 2025 | June 27, 2025 | July 18, 2025 | July 19, 2025 |
