Dimensions
Size comparison
Watch 4Watch 2
| Watch 4 | Watch 2 | Difference | |
|---|---|---|---|
| Height | 45.3 mm | 46.4 mm | −1.1 mm |
| Width | 39.1 mm | 38.5 mm | +0.6 mm |
| Thickness | 11.2 mm | 11.6 mm | −0.4 mm |
| Weight | 32 g | 35 g | −3 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch 4 better than Watch 2?
- Weight32 g vs 35 g+9%
- Pixel density340 ppi vs 326 ppi+4%
- Thickness11.2 mm vs 11.6 mm+4%
Why is Watch 2 better than Watch 4?
- Storage4 GB vs 8 GB2×
- Screen size1.75″ vs 1.91″+9%
- Battery capacity451 mAh vs 510 mAh+13%
- Resolution (width)390 px vs 402 px+3%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | 46 mm |
| Weight | 32 g | 35 g |
| Thickness | 11.2 mm | 11.6 mm |
| Height | 45.3 mm | 46.4 mm |
| Width | 39.1 mm | 38.5 mm |
| Case material | Plastic / polymer | Aluminium |
| Water resistance | 5 ATM | 5 ATM |
| Colours | Black, Gold | Star Blue, Platinum Black, Rose Gold |
| Display | ||
| Screen size | 1.75″ | 1.91″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Resolution (width) | 390 px | 402 px |
| Resolution (height) | 450 px | 476 px |
| Pixel density | 340 ppi | 326 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery capacity | 451 mAh | 510 mAh |
| Battery type | Li-Ion | Li-Ion |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Sensors | Accelerometer, gyro, heart rate, SpO2 | Accelerometer, gyro, heart rate, compass, barometer, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS |
| Barometric altimeter | — | Yes |
| Compass | — | Yes |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | Yes |
| eSIM | Yes | Yes |
| Wi-Fi | — | Wi-Fi 4 |
| Bluetooth | 5.2 | 5 |
| Smart features | ||
| Speaker | Yes | Yes |
| Storage | 4 GB | 8 GB |
| RAM | 0.031 GB | 1 GB |
| Platform | ||
| Operating system | MagicOS 7.2 | Android Wear OS - International ColorOS Watch 2.0 - China |
| Platform | Proprietary | Android |
| Chipset | — | Qualcomm Snapdragon Wear 4100 |
