Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
If you are interested in more details, you can find full information on the seller's page.
The B57-B is a smart watch and fitness bracelet with blood pressure, blood oxygen, and heart rate monitoring. It has an IP67 water resistance rating.
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| Model | B57-B | 115PULS | CF18 | IXIU P70 | DT78 | |
| Price | €12.39 | €18.99 | €10.77 | €14.30 | €22.42 | €15.19 |
| Seller | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba | Alibaba |
| Update | Nov 13, 2026 | Nov 13, 2026 | Nov 13, 2026 | Nov 13, 2026 | Nov 13, 2026 | Nov 13, 2026 |
| Product Type | Smart Watch | smart watch | Smart Watch, Sports Bracelet | Fitness Tracker, Smart Bracelet Watch | Smart Watch, Sports Bracelet | |
| Waterproof | waterproof | waterproof | Waterproof | |||
| Water Resistance Rating | ip68 | IP67 | IP68 | |||
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