Dimensions
Size comparison
U1Watch X5i
| U1 | Watch X5i | Difference | |
|---|---|---|---|
| Height | 49.8 mm | 46.7 mm | +3.1 mm |
| Width | 42.4 mm | 40.5 mm | +1.9 mm |
| Thickness | 11.4 mm | 10.9 mm | +0.5 mm |
| Weight | 44 g | 28 g | +16 g |
Drawn to the same scale from the official dimensions (front and side).
Why is U1 better than Watch X5i?
U1 has no measurable advantages in this pair.
Why is Watch X5i better than U1?
- AMOLED / OLED displayNo · U1: Yes
- Weight43.8 g vs 28 g+56%
- Screen size1.93″ vs 1.97″+2%
- Resolution (width)240 px vs 390 px+62%
- Pixel density194 ppi vs 302 ppi+56%
- Battery capacity300 mAh vs 420 mAh+40%
- Thickness11.4 mm vs 10.9 mm+5%
Specifications
Side by side
| Design & durability | ||
| Case size | 50 mm | 47 mm |
| Weight | 43.8 g | 28 g |
| Thickness | 11.4 mm | 10.9 mm |
| Height | 49.8 mm | 46.7 mm |
| Width | 42.4 mm | 40.5 mm |
| Case material | — | Plastic / polymer |
| Strap material | — | Silikon |
| Water resistance | 1 ATM | 1 ATM |
| Ingress protection | — | IP68 |
| Water resistance (IPx) | — | IPx8 |
| Water rating (maker) | — | 1 ATM |
| Colours | Black, Pink | Black, White |
| Display | ||
| Screen size | 1.93″ | 1.97″ |
| Display technology | LCD | AMOLED |
| Panel | TFT LCD | AMOLED |
| AMOLED / OLED display | No | Yes |
| Resolution (width) | 240 px | 390 px |
| Resolution (height) | 288 px | 450 px |
| Pixel density | 194 ppi | 302 ppi |
| Refresh rate | 60 Hz | 60 Hz |
| Battery | ||
| Battery life (smartwatch mode) | — | 21 days |
| Battery capacity | 300 mAh | 420 mAh |
| Battery type | — | Li-Po |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| Sleep tracking | — | Yes |
| Sensors | Accelerometer, gyro, heart rate, SpO2 | Accelerometer, heart rate, SpO2 |
| Sports & navigation | ||
| Built-in GPS | No | No |
| Connectivity | ||
| NFC payments | No | No |
| LTE (cellular) | No | No |
| eSIM | No | No |
| Bluetooth | 5.4 | 5.4 |
| Smart features | ||
| Speaker | Yes | Yes |
| Microphone | — | Yes |
| Platform | ||
| Operating system | Proprietary OS | RTOS OS |
| Platform | Proprietary | Proprietary |
| Works with | — | iOS, Android |
