Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
B57 Multiple Sport Modes Smart Watch Fitness Bracelet
Available Options
Current
Multiple Sport Modes
Alibaba
€11.06
Available to order
Features
- Heart rate monitor
- Blood pressure monitor
- Multiple sport modes
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
The B57 is a smart watch fitness bracelet. It includes a heart rate monitor, a blood pressure monitor, and multiple sport modes.
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| Brand | Amazon | Fitpolo | SYYTECH | |||
| Model | B57 | T80 | D205L | SX16 | F8 | |
| Color | ||||||
| Rating | ||||||
| Price | €11.06 | €17.56 | €10.45 | €15.80 | €18.87 | €14.04 |
| 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 | smart watch | smart watch, Fitness Tracker, smart bracelet, smartwatch | activity fitness smart sport watch | Smart Watch | smart watch, smart bracelet | |
| Heart Rate Monitoring | heart rate monitor | Heart Rate Monitor | heart rate monitor | heart rate | ||
Smart Watch Fitness Bracelet Heart rate monitor
€11.06
When this device makes sense
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