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 is a smartwatch with a 1.3 inch colorful large touch screen. It includes blood pressure monitoring and is stated to be waterproof.
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
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Smartwatch with Touchscreen and Blood Pressure Monitoring 1.3 inch colorful touchscreen display
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Karen M K9
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KECHAODA M4 Blood pressure monitoring.
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Smart Watch with Blood Pressure Monitoring and Big Screen Blood pressure monitoring
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Touchscreen smartwatch Dynamic heart rate monitoring
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COLMI P8 Waterproof: Yes
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| Brand | Karen M | KECHAODA | COLMI | |||
| Model | B57 | K9 | M4 | BHF42 | P70 | P8 |
| Price | £8.49 | £12.87 | £12.71 | £16.65 | £16.88 | £9.31 |
| 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 | Smartwatch | smart bracelet, smartwatch, smart watch | smart Watch | Smart Watch | Smart Watch | |
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