Dimensions
Size comparison
CS1CS3
| CS1 | CS3 | Difference | |
|---|---|---|---|
| Height | 41.5 mm | 43.9 mm | −2.4 mm |
| Width | 35.9 mm | 35.4 mm | +0.5 mm |
| Thickness | 8.9 mm | 11.3 mm | −2.4 mm |
| Weight | 45 g | 38 g | +7 g |
Drawn to the same scale from the official dimensions (front and side).
Why is CS1 better than CS3?
- Thickness8.9 mm vs 11.3 mm+27%
- Pixel density242 ppi vs 218 ppi+11%
Why is CS3 better than CS1?
- Screen size1.4″ vs 1.69″+21%
- Weight45 g vs 38 g+18%
- Battery capacity200 mAh vs 235 mAh+18%
Specifications
Side by side
| Design & durability | ||
| Case size | 42 mm | 44 mm |
| Weight | 45 g | 38 g |
| Thickness | 8.9 mm | 11.3 mm |
| Height | 41.5 mm | 43.9 mm |
| Width | 35.9 mm | 35.4 mm |
| Case material | Plastic / polymer | Plastic / polymer |
| Ingress protection | IP68 | IP68 |
| Water resistance (IPx) | IPx8 | IPx8 |
| Colours | Graphite Black, Space Gray | Black, Pink, Green, Purple, Blue |
| Display | ||
| Screen size | 1.4″ | 1.69″ |
| Display technology | LCD | LCD |
| Panel | IPS LCD | IPS LCD |
| AMOLED / OLED display | No | No |
| Resolution (width) | 240 px | 240 px |
| Resolution (height) | 240 px | 280 px |
| Pixel density | 242 ppi | 218 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery capacity | 200 mAh | 235 mAh |
| Battery type | Li-Ion | Li-Ion |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | — | Yes |
| Sensors | Accelerometer, heart rate | Accelerometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | No | No |
| Connectivity | ||
| NFC payments | No | No |
| LTE (cellular) | No | No |
| eSIM | No | No |
| Bluetooth | 4 | 5.1 |
| Smart features | ||
| Speaker | No | No |
| Platform | ||
| Operating system | Proprietary | Proprietary |
| Platform | Proprietary | Proprietary |
| Chipset | nRF52832 | Realtek 8762DK |
