Dimensions
Size comparison
Watch 2RWatch S4
| Watch 2R | Watch S4 | Difference | |
|---|---|---|---|
| Height | 47 mm | 47.3 mm | −0.3 mm |
| Width | 46.6 mm | 47.3 mm | −0.7 mm |
| Thickness | 12.1 mm | 12 mm | +0.1 mm |
| Weight | 37 g | 44 g | −8 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch 2R better than Watch S4?
- Weight37 g vs 44.5 g+20%
- Battery capacity500 mAh vs 486 mAh+3%
Why is Watch S4 better than Watch 2R?
- Battery life (smartwatch mode)4.2 days vs 15 days3.6×
- Peak brightness1,000 nits vs 2,200 nits2.2×
- LTE (cellular)No · Watch 2R: Yes
- eSIMNo · Watch 2R: Yes
Specifications
Side by side
| Design & durability | ||
| Case size | 47 mm | 47 mm |
| Weight | 37 g | 44.5 g |
| Thickness | 12.1 mm | 12 mm |
| Height | 47 mm | 47.3 mm |
| Width | 46.6 mm | 47.3 mm |
| Case material | Aluminium | Aluminium |
| Sapphire crystal | Yes | — |
| Lens / cover glass | Panda Glass | Scratch/drop-proof glass |
| Strap material | Silikon | — |
| Water resistance | 5 ATM | 5 ATM |
| Ingress protection | IP68 | — |
| Water resistance (IPx) | IPx8 | — |
| Water rating (maker) | 1 m / 5 ATM | 50 m / 5 bar / 5 ATM |
| Colours | Forest Green, Gunmetal Gray | Black, Silver, Rainbow |
| Display | ||
| Screen size | 1.43″ | 1.43″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Always-on display | Yes | — |
| Touchscreen | Yes | Yes |
| Resolution (width) | 466 px | 466 px |
| Resolution (height) | 466 px | 466 px |
| Pixel density | 326 ppi | 326 ppi |
| Peak brightness | 1,000 nits | 2,200 nits |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 4.2 days | 15 days |
| Battery life (hours) | 100 h | — |
| Battery capacity | 500 mAh | 486 mAh |
| Battery type | — | Li-Po |
| Wireless charging | No | — |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | Accelerometer, gyro, barometer, compass, heart rate, SpO2 | Accelerometer, gyro, compass, barometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Dual-band GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | GLONASS, GALILEO, BDS, QZSS |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | No | Yes |
| eSIM | No | Yes |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5 | 5.3 |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | Yes |
| Voice assistant | Yes | — |
| Music on the watch | Yes | — |
| Storage | 32 GB | — |
| RAM | 2 GB | — |
| Platform | ||
| Operating system | Android Wear OS | HyperOS 2 |
| Platform | Android | Proprietary |
| Works with | Android | iOS, Android |
| Chipset | Qualcomm Snapdragon W5 Gen 1 | — |
