R13 SIZE 8 Smart Ring: Heart rate detection
But wait, there's more (because of course there is):
- Whether you're running, swimming, or just trying to remember if you moved today, its multiple sport modes have got you covered.
- It keeps tabs on your sleep, because let's face it, we could all use a little more quality shut-eye.
- Counts your steps and syncs them straight to your APK/APP, because bragging rights are important.
Durability? Check. With a 5ATM waterproof rating, it laughs in the face of rain (and showers, and probably even your tears after seeing your step count). Plus, it boasts a 3-5 day battery life and comes with a magnetic charging cable because fumbling with cords is so last decade. Compatible with Android 6.0 or above and iOS 11.0 or above, it's pretty much ready to roll with whatever gadget you've got.
General specs
- Model: R13 SIZE 8
- 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 18.2mm; Perimeter 57mm
- 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.
View on seller's site
#publicidad
$14.50
Last price update: 7/23/25
Available to order
Shipping options
Delivery to 
United States
United States
Available
Video Reviews
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Smart Ring Heart rate detection
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Smart Ring Heart rate monitoring
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Smart Fitness Tracker Ring
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Smart Ring Fitness Tracker 24-hour health tracking
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Smart Health Ring 24-hour heart rate monitoring
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| Brand | Delcast | Delcast | Hivisuals | HitTopss | ||
| Model | R13 SIZE 8 | R09 SIZE 9 | ||||
| Color | ||||||
| Rating |
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| Price | $14.50 | $15.41 | $55.99 | $55.99 | $45.99 | $29.99 |
| Seller | Sunsky | Sunsky | Amazon | Amazon | Amazon | Amazon |
| Update | August 2, 2025 | July 26, 2025 | July 20, 2025 | July 19, 2025 | June 27, 2025 | June 27, 2025 |
| Waterproof | 5ATM | 5ATM | IP68 | |||
Smart Ring
$14.50
Reviews
4.75
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