Sleep Wearable Form Factor
Compare smart rings, fitness bands, and smartwatches for overnight sleep tracking: comfort, battery habits, and sleep metric depth.
B57 1.3-inch Touchscreen Smartwatch with Touchscreen and Blood Pressure Monitoring
Available Options
Current
1.3-inch Touchscreen
Alibaba
€9.85
Available to order
Features
- 1.3 inch colorful touchscreen display
- Blood pressure monitoring
- Waterproof
Product details
General specs
- Model: B57
- Model: B57
- Water Resistance: Waterproof
If you are interested in more details, you can find full information on the seller's page.
€9.85
Last price update: 9/22/26
Available to order
Shipping options
Delivery to 
United States
United States
Available
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.
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| Brand | KECHAODA | COLMI | Haylou | |||
| Model | B57 | M4 | BHF42 | P8 | LS01 | |
| Color | ||||||
| Rating | ||||||
| Price | €9.85 | €14.92 | €14.75 | €19.31 | €10.80 | €14.53 |
| 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 | Smartwatch | smart bracelet, smartwatch, smart watch | smart Watch | Smart Watch | Smart Watch | Smartwatch |
| Display Size | 1.3 inch | 1.4 inch | 1.3 Inch | |||
Smartwatch with Touchscreen and Blood Pressure Monitoring 1.3 inch colorful touchscreen display
€9.85
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