Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
B57 Bluetooth with 24-Hour Heart Rate Monitoring Smart watch
Available Options
Current
Bluetooth with 24-Hour Heart Rate Monitoring
Alibaba
€11.06
Available to order
Features
- Supplier-stated 24hrs heart rate monitoring
- Bluetooth connectivity
- Supplier-stated IP67 waterproof rating
Product details
General specs
- Model: B57
- Model: B57
If you are interested in more details, you can find full information on the seller's page.
€11.06
Last price update: 9/22/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
Model B57 smart watch with Bluetooth connectivity, an IP67 waterproof rating, and 24-hour heart rate monitoring.
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| Brand | SYYTECH | DT NO.1 | ||||
| Model | B57 | B57 | CF18 | Z02 | DT88 | H2 |
| Color | ||||||
| Rating | ||||||
| Price | €11.06 | €10.36 | €13.87 | €12.28 | €19.31 | €20.28 |
| Seller | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba |
| Update | Sep 28, 2026 | Sep 28, 2026 | Sep 28, 2026 | Sep 28, 2026 | Sep 28, 2026 | Sep 28, 2026 |
| Heart Rate Monitoring | 24hrs | Heart Rate Monitor | Heart Rate Monitor | Heart Rate | ||
| Product Type | Smart Watch, Sports Bracelet | Smart Watch, Smart Bracelet | Smartwatch | Sports Watch, Smart Bracelet | ||
Smart watch Supplier-stated 24hrs heart rate monitoring
€11.06
When this device makes sense
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