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.
Medium smartwatch with Bluetooth calling, Android and iOS compatibility, and listed health functions including heart rate, blood pressure and blood sugar.
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
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allentian C20plus Bluetooth calling
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allentian C21 Bluetooth calling
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allentian C20 IP67 water and dust protection rating
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allentian T21 Measures heart rate and blood pressure.
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allentian C20pro Compatible with Android and iOS
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allentian C20 Supports heart rate monitoring
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| Brand | allentian | allentian | allentian | allentian | allentian | allentian |
| Model | C20plus | C21 | C20 | T21 | C20pro | C20 |
| Price | €88.33 | €110.86 | €57.68 | €59.49 | €61.29 | €98.24 |
| Seller | Newegg | Newegg | Newegg | Newegg | Newegg | Newegg |
| Update | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 | Nov 12, 2026 |
| Size | Medium | Medium | Medium | Medium | Medium | Medium |
| Calling | Bluetooth calling | Bluetooth calling | Bluetooth calling | |||
| Model Name | C20plus | C21 | C20 | T21 | C20pro | C20 |
| Part Number | 779261361669Green | 676959425408AllBlack | 5100578589451 | 5157592253254 | 661740078878Black | 672236601559Black |
| Product Type | Smartwatch | Smartwatch | Smartwatch | Smartwatch | Smart watch | Smart watch |
| Compatibility | Android and iOS | Android and iOS | Android and iOS | Android and iOS | Android / IOS | Android / IOS |
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