R13 SIZE 10 Smart Ring: Heart rate detection
But wait, there's more! Snap pics from afar or dive into motion-sensing games when you're in the mood for some fun. Fancy a bit of gesture control? This ring's got you covered. Plus, with a variety of sport modes, it's ready to hustle as hard as you do. Sleek? Check. Comfy? Absolutely—with a 19.9mm diameter and 62.5mm perimeter, it's designed for all-day wear without a second thought.
And just when you thought it couldn't get any better, this little powerhouse boasts a 3-5 day battery life and can take a splash (up to 5ATM, to be exact). Whether you're team Android (6.0 or above) or iOS (11.0 or above), syncing your data is a breeze with the ECTRI app. Durable, reliable, and just plain cool—what's not to love?
General specs
- Brand: R13
- Model: SIZE 10
- 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 19.9mm, Perimeter 62.5mm
- 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 10 Heart rate detection
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Smart Ring Health Tracker with Display Screen & Touch Button
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| Brand | R13 | Twievo | Delcast | Melilinkcn | ||
| Model | SIZE 10 | 2025 | 2025 | |||
| Color | ||||||
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| Price | $14.50 | $59.99 | $39.99 | $59.99 | $55.99 | $55.98 |
| Seller | Sunsky | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | August 2, 2025 | June 27, 2025 | July 18, 2025 | June 27, 2025 | July 20, 2025 | June 27, 2025 |
| Waterproof | 5ATM | IP68 | IP68 | |||
| Weight | 3.5g | 3.5g | 100 Grams | |||
