Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
B57 Heart Rate Monitor Smart Bracelet with Heart Rate Monitor
Available offers (2)
Current
Heart Rate Monitor
Alibaba
€9.82
Available to order
Features
- Heart rate monitor
- Colorful screen
- Capacitive touch key
General specs
- Model: B57
- Seller: Alibaba
- ID: 62306544122
- Model: B57
- Features: Heart Rate Monitor, Capacitive touch Key
- Product Type: Smart Bracelet, Smart Watch
- Display Description: Big Colorful Screen
- First listed by seller: September 22, 2026
If you are interested in more details, you can find full information on the seller's page.
€9.82
Last price update: 9/22/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
The B57 is a smart bracelet / smart watch with a display.
- Heart rate monitor
- Capacitive touch key control
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| Model | B57 | W4 / W34 | Y3plus / Y3 | W34 Fox | CF68 | CS200 |
| Price | €9.82 | €9.21 | €10.26 | €13.39 | €18.64 | €19.64 |
| Seller | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba |
| Update | Oct 11, 2026 | Oct 11, 2026 | Oct 11, 2026 | Oct 11, 2026 | Oct 11, 2026 | Oct 11, 2026 |
| Product Type | Smart Bracelet, Smart Watch | Smart Watch, Smart Bracelet, Wristband | Smart Bracelet, smart watch | sport smartbracelet | smart bracelet, smartwatch | Smart Watch |
Smart Bracelet with Heart Rate Monitor Heart rate monitor
€9.82
When this device makes sense
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