Dimensions
Size comparison
Watch 4Watch D2
| Watch 4 | Watch D2 | Difference | |
|---|---|---|---|
| Height | 46.2 mm | 48 mm | −1.8 mm |
| Width | 46.2 mm | 38 mm | +8.2 mm |
| Thickness | 10.9 mm | 13.3 mm | −2.4 mm |
| Weight | 48 g | 40 g | +8 g |
Drawn to the same scale from the official dimensions (front and side).
Why is Watch 4 better than Watch D2?
- LTE (cellular)Yes · Watch D2: No
- eSIMYes · Watch D2: No
- Thickness10.9 mm vs 13.3 mm+22%
- Resolution (width)466 px vs 408 px+14%
Why is Watch D2 better than Watch 4?
- Battery life (smartwatch mode)3 days vs 6 days2×
- Screen size1.5″ vs 1.82″+21%
- Weight48 g vs 40 g+20%
- Pixel density310 ppi vs 347 ppi+12%
Specifications
Side by side
| Design & durability | ||
| Case size | 46 mm | 48 mm |
| Weight | 48 g | 40 g |
| Thickness | 10.9 mm | 13.3 mm |
| Height | 46.2 mm | 48 mm |
| Width | 46.2 mm | 38 mm |
| Case material | Stainless steel | Aluminium |
| Strap material | Leder, Fluorelastomer | — |
| Water resistance | 5 ATM | — |
| Ingress protection | IP6X | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | 50 m / 5 bar / 5 ATM | — |
| Colours | Black | Black, Gold |
| Display | ||
| Screen size | 1.5″ | 1.82″ |
| Display technology | AMOLED | AMOLED |
| Panel | AMOLED | AMOLED |
| AMOLED / OLED display | Yes | Yes |
| Touchscreen | Yes | Yes |
| Resolution (width) | 466 px | 408 px |
| Resolution (height) | 466 px | 480 px |
| Pixel density | 310 ppi | 347 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | 3 days | 6 days |
| Battery capacity | 530 mAh | 524 mAh |
| Battery type | Li-Ion | Li-Ion |
| Wireless charging | Yes | Yes |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | Yes | Yes |
| Skin temperature | Yes | Yes |
| Temperature sensor | Yes | Yes |
| Sleep tracking | Yes | Yes |
| Sensors | Accelerometer, gyro, heart rate, barometer, compass, SpO2, thermometer (body temperature) | Accelerometer, gyro, heart rate, SpO2, thermometer (skin temperature), differential pressure sensor, barometer |
| Sports & navigation | ||
| Built-in GPS | Yes | Yes |
| Satellite systems | GLONASS, GALILEO, BDS, QZSS | — |
| Barometric altimeter | Yes | Yes |
| Compass | Yes | Yes |
| Multisport / triathlon mode | Yes | — |
| Connectivity | ||
| NFC payments | Yes | Yes |
| LTE (cellular) | Yes | No |
| eSIM | Yes | No |
| Wi-Fi | Wi-Fi 4 | — |
| Bluetooth | 5.2 | 5.2 |
| Smart features | ||
| Calls from the wrist | — | Yes |
| Speaker | Yes | Yes |
| Voice assistant | Yes | — |
| Music on the watch | Yes | Yes |
| Storage | 32 GB | — |
| RAM | 2 GB | — |
| Platform | ||
| Operating system | HarmonyOS 3.0 | HarmonyOS 5.0 |
| Platform | HarmonyOS | HarmonyOS |
| Works with | iOS, Android | Android, iOS |
| Chipset | Qualcomm Snapdragon W5 Gen 1 | — |
