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.
C21pro smart watch with a 1.39-inch display, pedometer step counting, Bluetooth calling, heart rate and blood pressure measurement, and Android / IOS compatibility. It has an outdoor three-proof designation.
| This item | Recommendations | |||||
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allentian C21pro 1.39-inch display
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allentian C20pro Compatible with Android and iOS
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allentian C20 Heart rate monitoring
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allentian C20 Supports heart rate monitoring
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allentian C22 1.6-inch watch size
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allentian C21 Supports Android and iOS
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| Brand | allentian | allentian | allentian | allentian | allentian | allentian |
| Model | C21pro | C20pro | C20 | C20 | C22 | C21 |
| Price | €68.81 | €60.76 | €57.19 | €97.40 | €150.12 | €115.27 |
| Seller | Newegg | Newegg | Newegg | Newegg | Newegg | Newegg |
| Update | Nov 3, 2026 | Nov 3, 2026 | Nov 3, 2026 | Nov 3, 2026 | Nov 3, 2026 | Nov 3, 2026 |
| Size | Medium | Medium | Medium | Medium | Medium | Medium |
| Model Name | C21pro | C20pro | C20 | C20 | C22 | C21 |
| Part Number | 719091237520Silver | 661740078878Black | 5100578589452 | 672236601559Black | 694260307996Silver | 641277286062Black |
| Product Type | Smart watch | Smart watch | Smart watch | Smart watch | smart watch | smart watch |
| Compatibility | Android / IOS | Android / IOS | Android / IOS | Android / IOS | Android / IOS | |
| Bluetooth Calling | Supported | Supported | Supported | |||
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