Why is C21 better than SW-162?
- Battery capacity300 mAh vs 180 mAh+67%
Why is SW-162 better than C21?
- Screen size1.32″ vs 1.4″+6%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | — |
| Thickness | 13 mm | — |
| Height | 46.5 mm | — |
| Width | 46.5 mm | — |
| Case material | — | Plastic / polymer |
| Lens / cover glass | Corning Gorilla Glass | — |
| Strap material | — | Silikon |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver | — |
| Display | ||
| Screen size | 1.32″ | 1.4″ |
| Display technology | LCD | — |
| Panel | TFT LCD | IPS |
| AMOLED / OLED display | No | No |
| Resolution (width) | 360 px | — |
| Resolution (height) | 360 px | — |
| Pixel density | 386 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery capacity | 300 mAh | 180 mAh |
| Battery type | — | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| Skin temperature | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate, SpO2, blood pressure | heart rate |
| Sports & navigation | ||
| Built-in GPS | No | — |
| Connectivity | ||
| NFC payments | No | — |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Bluetooth | 5 | — |
| Smart features | ||
| Speaker | No | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
| Works with | — | iOS, Android |
