Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
B57 Sports Sports smartwatch
Available Options
Current
Sports
Alibaba
€12.07
Available to order
Features
- Waterproof
- Heart rate monitor
- Blood pressure monitoring
- Suitable for women, men, and kids
Product details
General specs
- Model: B57
- Model: B57
- Water Resistance: Waterproof
If you are interested in more details, you can find full information on the seller's page.
€12.07
Last price update: 9/22/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
The B57 is a sports smartwatch with heart rate and blood pressure monitoring functions. It is described as waterproof and suitable for women, men, and kids.
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| Brand | Zeblaze | Kingwear | Amazon | |||
| Model | B57 | SX16 | Hybrid 2 | KW19 | T80 | |
| Color | ||||||
| Rating | ||||||
| Price | €12.07 | €10.16 | €18.87 | €32.04 | €12.73 | €10.45 |
| 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 |
| Product Type | Sports Smart watches | smart watch | Smart Watch | Smartwatch | Smart Watch | smart watch, Fitness Tracker, smart bracelet, smartwatch |
Sports smartwatch Waterproof
€12.07
When this device makes sense
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