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 K9 sports smartwatch has a round display and an IP68 water-resistance rating. It includes heart rate monitoring and fitness-tracking functions.
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
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Round Screen Smart Watch Water resistance rating: IP68
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SANDA SANDA CF18 For sport and fitness use
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Round-Screen Fitness Smartwatch Heart rate monitoring
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Stainless Steel Fitness Smartwatch IP68 water resistance rating
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Smartwatch with Heart Rate Monitor IP68 water resistance rating
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| Model | K9 | SANDA CF18 | CK20S | KW10 | P70/P80 | |
| Price | €11.31 | €14.93 | €18.68 | €15.91 | €22.62 | €19.34 |
| 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 |
| Fitness Tracking | fitness tracker | Fitness Tracker | Fitness Tracker | |||
| Waterproof Rating | IP68 | IP67 | IP67 | IP68 | ||
| Heart Rate Monitoring | heart rate | Heart Rate Monitor | Heart Rate Monitoring | Heart Rate Monitor | ||
| Product Type | Smart Watch | Smart Watch | Fitness Watch, Smartwatch, Smart Wrist Watches | Smart Watch | ||
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