Why is C21 better than SWC-342?
- Screen size1.32″ vs 1.2″+10%
- Battery capacity300 mAh vs 180 mAh+67%
- Resolution (width)360 px vs 240 px+50%
Why is SWC-342 better than C21?
- Thickness13 mm vs 11 mm+18%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | — |
| Thickness | 13 mm | 11 mm |
| Height | 46.5 mm | — |
| Width | 46.5 mm | — |
| Case material | — | Plastic / polymer |
| Lens / cover glass | Corning Gorilla Glass | — |
| Strap material | — | Kunststoff |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Colours | Black, Silver | — |
| Display | ||
| Screen size | 1.32″ | 1.2″ |
| Display technology | LCD | — |
| Panel | TFT LCD | Farbdisplay |
| AMOLED / OLED display | No | No |
| Resolution (width) | 360 px | 240 px |
| Resolution (height) | 360 px | 240 px |
| Pixel density | 386 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | — | 3 days |
| Battery capacity | 300 mAh | 180 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | — |
| ECG | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate, SpO2, blood pressure | heart rate, accelerometer |
| Sports & navigation | ||
| Built-in GPS | No | — |
| Connectivity | ||
| NFC payments | No | — |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Bluetooth | 5 | 3 |
| Smart features | ||
| Speaker | No | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
| Works with | — | Android |
| Chipset | — | Realtek 8763C |
