Dimensions
Size comparison
X1C4
| X1 | C4 | Difference | |
|---|---|---|---|
| Case size | 44.5 mm | 51 mm | −6.5 mm |
| Thickness | 14.2 mm | 9.8 mm | +4.4 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is X1 better than C4?
- Battery capacity850 mAh vs 300 mAh2.8×
- Screen size2.13″ vs 2.01″+6%
- Resolution (width)410 px vs 296 px+39%
Why is C4 better than X1?
- Thickness14.2 mm vs 9.8 mm+45%
Specifications
Side by side
| Design & durability | ||
| Case size | 53 mm | 51 mm |
| Weight | — | 45 g |
| Thickness | 14.2 mm | 9.8 mm |
| Height | 52.7 mm | — |
| Width | 44.5 mm | — |
| Lens / cover glass | Tempered glass | — |
| Water resistance | 2 ATM | 2 ATM |
| Colours | Gray | — |
| Display | ||
| Screen size | 2.13″ | 2.01″ |
| Display technology | AMOLED | — |
| Panel | AMOLED | — |
| AMOLED / OLED display | Yes | — |
| Resolution (width) | 410 px | 296 px |
| Resolution (height) | 502 px | 240 px |
| Pixel density | 304 ppi | — |
| Refresh rate | 60 Hz | — |
| Battery | ||
| Battery life (smartwatch mode) | — | 10 days |
| Battery capacity | 850 mAh | 300 mAh |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, heart rate, SpO2, blood pressure, barometer, compass | — |
| Sports & navigation | ||
| Built-in GPS | No | — |
| Barometric altimeter | Yes | — |
| Compass | Yes | — |
| Connectivity | ||
| NFC payments | No | — |
| LTE (cellular) | No | — |
| eSIM | No | — |
| Bluetooth | 5.2 | — |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | — |
| Platform | ||
| Operating system | Proprietary OS | — |
| Platform | Proprietary | — |
| Works with | — | Android, iOS |
