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 offers (5)
Current
Sports
Alibaba
€12.39
Available to order
Features
- Waterproof
- Heart rate monitor
- Blood pressure monitoring
- Suitable for women, men, and kids
General specs
- Model: B57
- Seller: Alibaba
- ID: 62439688856
- Model: B57
- Product Type: Sports Smart watches
- Intended Users: Women, men, kid
- Water Resistance: Waterproof
- Heart Rate Monitoring: Heart Rate Monitor
- Blood Pressure Function: Blood Pressure Functions
- First listed by seller: September 22, 2026
If you are interested in more details, you can find full information on the seller's page.
€12.39
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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| Model | B57 | Ticwatch W34 / F8 | Hybrid 2 | KW19 | KW19 | |
| Price | €12.39 | €10.43 | €19.37 | €32.90 | €11.63 | €13.07 |
| Seller | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba |
| Update | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 |
| Product Type | Sports Smart watches | smart watch | Smart Watch | Smartwatch | Smart Bracelet Watch, Smart Watch | Smart Watch |
| Intended Users | Women, men, kid | Women, Men | Women, Men | |||
Sports smartwatch Waterproof
€12.39
When this device makes sense
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