R04 Smart Ring: Heart rate monitoring
Think the Smart Ring is just another shiny trinket? Think again. This little powerhouse is your all-in-one health guru and lifestyle sidekick, thanks to its Jeri chipset and Bluetooth 5.4 that keep you connected without breaking a sweat. And with the STK8321-W sensor chip doing the heavy lifting, you're getting spot-on health stats—from heart rate variability to how stressed you are (probably from deciding which feature to use first). Plus, with a battery that lasts 5-7 days and charges in a flash, it's practically begging to be your constant companion.
Rain or shine, this ring's 5ATM waterproof rating means it's game for anything—swim, shower, or an unexpected downpour. And with an app that speaks your language (literally, it supports a ton of them), it's ready to roll no matter where you are. Tracking steps? Check. Spying on your sleep? You bet. Even snapping pics from afar is a breeze. This ring doesn't just adapt to your life; it makes it better.
- Under the hood: Jeri chipset (because even rings need brains)
- Stays connected with Bluetooth 5.4
- Health tracking? STK8321-W sensor chip has your back
- Battery life: 15mAh (or 18mAh if you've got bigger fingers—size 9 and up)
- Waterproof like a duck: 5ATM
- Plays nice with Android 5.1+ and iOS 8.0+
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
- 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
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Smart Fitness Ring Activity tracking
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Hugrow KR2 Comprehensive Wellness Tracking
|
Gwenland SR08 Multi-Sport Tracker
|
Smart Ring Health Tracker Comprehensive health monitoring
|
YULUCKGO SRC10 Health Heart Rate Monitoring
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| Brand | Weylmd | Hugrow | Gwenland | Mefoma | YULUCKGO | |
| Model | R04 | KR2 | SR08 | SRC10 | ||
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| Price | $10.18 | $39.99 | $49.99 | $55.99 | $59.99 | $39.99 |
| Seller | Sunsky | Amazon | Amazon | Amazon | Amazon | Amazon |
| Update | May 8, 2025 | May 12, 2025 | May 12, 2025 | May 13, 2025 | May 13, 2025 | May 11, 2025 |
| Package Dimensions | 4.17 x 3.66 x 1.18 inches | 7.4 x 2.95 x 1.26 inches | 3.9 x 3.7 x 1.34 inches | |||
| Item Weight | 3.84 ounces | 5.6 ounces | 3.84 ounces | |||
| Batteries | 1 Nonstandard Battery batteries required. (included) | 1 AAA batteries required. (included) | 1 Lithium Polymer batteries required. (included) | |||
| Date First Available | February 20, 2025 | December 31, 2024 | December 31, 2024 | |||
