Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
R04 HRV & Temperature Monitor Smart Ring
Available Options
Current
HRV & Temperature Monitor
AliExpress
€15.50
Available to order
Price history by variant
Volatility: LowFeatures
- Heart rate variability monitoring
- Body temperature monitoring
- Multi sports modes
- Sleep monitoring
- Stainless steel construction
Product details
General specs
- Model: R04
- Model: R04
- Gender: Men, Women
- Sports Mode: Multi
- Sleep Monitoring: Yes
- Health Monitoring: Yes
If you are interested in more details, you can find full information on the seller's page.
€15.50
Last price update: 9/26/26
Available to order
Price History for seller AliExpress
Shipping options
Delivery to 
United States
United States
Available
Designed for the health-conscious individual who wants continuous wellness insights without the bulk of a wristband, the R04 Smart Ring fits seamlessly into your daily routine. Wear it while working, sleeping, or exercising to monitor key metrics like heart rate variability, body temperature, and sleep stages.
Unlike bulky fitness trackers, this ring stays out of the way. You’ll forget it’s there until the subtle vibration reminds you to stand up after a long meeting. The sensor picks up your pulse while you’re typing an email, giving you real-time stress readings. By tracking body temperature trends, it can alert you to early signs of illness before you feel symptoms.
With multi-sport modes and stainless steel durability, the R04 supports your active lifestyle. The accompanying app turns raw data into actionable insights, like adjusting your bedtime when HRV dips. It’s a personal health companion that works quietly in the background—so you can focus on living.
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| Brand | VAMOTRA | ZBNMY | ZBNMY | |||
| Model | R04 | Smart Ring Gen2 | ||||
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| Price | €15.50 | €35.11 | €13.91 | €37.73 | €30.73 | €140.46 |
| Seller | AliExpress | Retailer | AliExpress | Retailer | Retailer | Retailer |
| Update | Sep 26, 2026 | Apr 17, 2026 | Jun 24, 2026 | Apr 17, 2026 | Mar 21, 2026 | May 13, 2026 |
| Gender | Men, Women | Women, Men | Women, Men | |||
| Health Monitoring | Yes | Heart Rate, Blood Oxygen, Blood Pressure, Sleep Patterns, Sleep Quality Analysis, Deep Sleep, Light Sleep, Wake-up Time | Heart Rate, Blood Oxygen, Blood Pressure, Sleep Patterns | |||
| Compatibility | iPhone, Android | iOS, Android | iOS, Android | |||
Smart Ring Heart rate variability monitoring
€15.50
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