R04 Smart Ring: Heart rate monitoring
Meet the R04 Smart Ring—your new favorite gadget that's as stylish as it is smart. Packed with advanced sensors, this little powerhouse keeps tabs on your heart rate variability, blood oxygen levels, and even how stressed you're feeling (because let's face it, we could all use a reminder to chill sometimes).
And guess what? It's not just a fair-weather friend. With a 5ATM waterproof rating, this ring laughs in the face of rain, showers, and even your most enthusiastic swim strokes. Plus, its companion app speaks multiple languages, so no matter where you're from, it's got your back. Whether you're counting steps or analyzing your sleep (or lack thereof), the R04 delivers big in a tiny package.
- Under the hood, it's running on the Jeri chipset—smooth and efficient.
- Staying connected is a breeze with Bluetooth 5.4, so no more 'device not found' headaches.
- Battery life? A solid 5-7 days of use (or up to 15 if you're just letting it lounge around).
- And when it's time to power up, just ~1.5 hours and you're good to go.
- Works with Android 5.1+ and iOS 8.0+, because exclusivity is so last season.
General specs
- Model: R04
- Seller: Sunsky
- Chipset: Jeri
- Bluetooth: 5.4
- Sensor chip: STK8321-W
- Battery Capacity: 15mAh (18mAh for size 9 and above)
- Waterproof: 5ATM
- Size: Dia 20.8mm; Circumference 65.4mm
- Charging method: Magnetic charging
- Compatible system: Android5.1 or above, iOS8.0 or above
If you are interested in more details, you can find full information on the seller's page.
Comparison with similar products
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
Smart Ring Heart rate monitoring
|
Smart Ring with Health Monitoring and Gesture Control
|
Smart Ring with Health Monitoring, Multiple Sports Modes
|
Smart Ring with Health Monitoring, Multiple Sports Modes
|
Smart Ring Heart rate monitoring
|
Smart Ring Heart rate monitoring
|
|
| Brand | ||||||
| Model | R04 | R9 | R5 SIZE 10 | R5 SIZE 11 | R11 | R11 |
| Color | ||||||
| Rating |
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| Price | $10.18 | $15.72 | $11.19 | $11.10 | $20.26 | $20.26 |
| Seller | Sunsky | Sunsky | Sunsky | Sunsky | Sunsky | Sunsky |
| Update | May 8, 2025 | December 22, 2024 | December 7, 2024 | December 22, 2024 | May 13, 2025 | May 13, 2025 |
| Chipset | Jeri | Realtek | Realtek | |||
| Bluetooth | 5.4 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 |
| Sensor chip | STK8321-W | ST LIS2DOC | ST LIS2DOC | |||
| Battery Capacity | 15mAh (18mAh for size 9 and above) | 18mAh | 18mAh | 18mAh | 15mAh | 15mAh |
| Waterproof | 5ATM | IP68 | IP68 | IP68 | 5ATM | |
| Size | Dia 20.8mm; Circumference 65.4mm | Dia 19.8mm, Circumference 62.1mm | Dia 19.9mm; Circumference 62.1mm | Dia 20.7mm; Circumference 64.6mm | Dia 22.3mm, Circumference 70mm | Dia 21.6mm, Circumference 67.9mm |
| Compatible system | Android5.1 or above, iOS8.0 or above | Android5.1 or above, iOS8.0 or above | Android5.1 or above, iOS8.0 or above | |||
| CPU | Pixart 2860 | Pixart 2860 | Pixart 2860 | |||
| Heart Rate Sensor | HX3605 | HX3605 | HX3605 | |||
| Working Time | 5-7 days | 5-7 days | 5-7 days | |||
| Charging Time | 0.5H | 0.5H | 0.5H | |||
| Charging Method | Magnetic charging | Magnetic charging | Magnetic charging | |||
| Compatible System | Android6.0 or above, iOS11.0 or above | Android6.0 or above, iOS11.0 or above | Android6.0 or above, iOS11.0 or above | |||
| APP | EcTri | EcTri | EcTri | QRing | ||
