Why is Watch 4 better than BT20?
- Built-in GPSYes · BT20: No
- NFC paymentsYes · BT20: No
- LTE (cellular)Yes · BT20: No
- eSIMYes · BT20: No
- Battery capacity451 mAh vs 350 mAh+29%
- Pixel density340 ppi vs 331 ppi+3%
Why is BT20 better than Watch 4?
- Screen size1.75″ vs 1.96″+12%
- Resolution (width)390 px vs 410 px+5%
Specifications
Side by side
| Design & durability | ||
| Case size | 45 mm | — |
| Weight | 32 g | — |
| Thickness | 11.2 mm | — |
| Height | 45.3 mm | — |
| Width | 39.1 mm | — |
| Case material | Plastic / polymer | — |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | — | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Military-grade (MIL-STD-810) | — | Yes |
| Colours | Black, Gold | Black |
| Display | ||
| Screen size | 1.75″ | 1.96″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Resolution (width) | 390 px | 410 px |
| Resolution (height) | 450 px | 502 px |
| Pixel density | 340 ppi | 331 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery capacity | 451 mAh | 350 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, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | No |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Connectivity | ||
| NFC payments | Yes | No |
| LTE (cellular) | Yes | No |
| eSIM | Yes | No |
| Bluetooth | 5.2 | 5.2 |
| Smart features | ||
| Speaker | Yes | Yes |
| Storage | 4 GB | — |
| RAM | 0.031 GB | — |
| Platform | ||
| Operating system | MagicOS 7.2 | Proprietary OS |
| Platform | Proprietary | Proprietary |
