R04 Smart Ring: Heart rate monitoring
Think the R04 Smart Ring is just another shiny bauble? Think again. This little powerhouse is like having a personal trainer, sleep doctor, and stress therapist all snugly fitted on your finger. Thanks to its STK8321-W sensor chip and the brains of the Jeri2 chipset, it’s got your back (or rather, your finger) with spot-on stats for heart rate, blood oxygen, and even HRV to keep those stress levels in check. And yeah, it’ll tattle on your bad sleep habits too—because who doesn’t need a nudge to hit the hay earlier?
With Bluetooth 5.4, staying connected is a breeze—no more frustrating drop-offs mid-workout. Dive into the QRing app (yes, it speaks your language, literally) to see all your data laid out. Plus, the ring’s 5ATM waterproof rating means you can take it for a swim, and charging? Just snap it on with magnetic charging—no fumbling required. Whether you’re a gym rat or just trying to remember when to hydrate, it’s got modes for that. Oh, and it can snap pics remotely and remind you about, well, lady stuff. Handy, right?
Inside the box, you’ll find the ring itself, a charging cable (because, obviously), a user manual (for those who read them), and the original box—making it a no-brainer gift for anyone who loves tech or just needs a little health nudge.
General specs
- Model: R04
- Seller: Sunsky
- Chipset: Jeri2
- Bluetooth: 5.4
- Sensor chip: STK8321-W
- Battery Capacity: 15mAh (18mAh for size 9 and above)
- Battery life: 5-7 days of use, 15 days of standby
- Charging time: around 1.5 hours
- Waterproof: 5ATM
- Size: Dia 21.6mm, Circumference 67.9mm
- Charging method: Magnetic charging
- Compatible system: Android5.1 or above, iOS8.0 or above
- APP: QRing
- APP support language: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Türkiye, Hebrew, Greek, German, Italian, Latvian, Czech, Slovak, Slovenian, Japanese, French, Polish, Thai, Estonian, Swedish, Lithuanian, Simplified Chinese, Traditional Chinese, Romanian, English, Dutch, Portuguese, Spanish, Vietnamese, Arabic, Korean, Malay
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
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Smart Ring with Health Monitoring and Gesture Control
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Smart Ring with Health Monitoring, Multiple Sports Modes
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Smart Ring with Health Monitoring and Multiple Sports Modes
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Smart Ring with Health Monitoring, Multiple Sports Modes
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Fitness Tracking Smart Ring Comprehensive Fitness Tracking
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| Brand | HitTopss | |||||
| Model | R04 | R9 | R5 SIZE 10 | R5 SIZE 8 | R5 SIZE 11 | |
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| Price | $10.18 | $15.72 | $11.19 | $11.19 | $11.10 | $39.99 |
| Seller | Sunsky | Sunsky | Sunsky | Sunsky | Sunsky | Amazon |
| Update | May 8, 2025 | December 22, 2024 | December 7, 2024 | December 7, 2024 | December 22, 2024 | May 12, 2025 |
| Bluetooth | 5.4 | 5.1 | 5.1 | 5.1 | 5.1 | |
| Battery Capacity | 15mAh (18mAh for size 9 and above) | 18mAh | 18mAh | 18mAh | 18mAh | |
| Waterproof | 5ATM | IP68 | IP68 | IP68 | IP68 | |
| Size | Dia 21.6mm, Circumference 67.9mm | Dia 19.8mm, Circumference 62.1mm | Dia 19.9mm; Circumference 62.1mm | Dia 18.2mm; Circumference 56.9mm | Dia 20.7mm; Circumference 64.6mm | |
| APP | QRing | EcTri | EcTri | EcTri | EcTri | |
| CPU | Pixart 2860 | Pixart 2860 | Pixart 2860 | Pixart 2860 | ||
| Heart Rate Sensor | HX3605 | 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 | |||
