Dimensions
Size comparison
GBD-300Siona 2
| GBD-300 | Siona 2 | Difference | |
|---|---|---|---|
| Case size | 49 mm | 42 mm | +7 mm |
| Thickness | 14.9 mm | 6.9 mm | +8 mm |
Drawn to the same scale from the official dimensions (front and side).
Why is GBD-300 better than Siona 2?
GBD-300 has no measurable advantages in this pair.
Why is Siona 2 better than GBD-300?
- AMOLED / OLED displayNo · GBD-300: Yes
- Thickness14.9 mm vs 6.9 mm2.2×
Specifications
Side by side
| Design & durability | ||
| Case size | 49 mm | 42 mm |
| Thickness | 14.9 mm | 6.9 mm |
| Case material | Plastic / polymer | — |
| Lens / cover glass | Mineralglas Mineralglas | — |
| Strap material | Kunststoff, Resin | — |
| Water resistance | 20 ATM | — |
| Water rating (maker) | 200 m / 20 bar / 20 ATM | — |
| Display | ||
| Screen size | — | 1.3″ |
| Display technology | LCD | AMOLED |
| Panel | LED | AMOLED |
| AMOLED / OLED display | No | Yes |
| Always-on display | — | Yes |
| Battery | ||
| Battery life (smartwatch mode) | — | 2 days |
| Battery capacity | — | 150 mAh |
| Health sensors | ||
| Optical heart rate | — | Yes |
| Blood oxygen (SpO2) | — | Yes |
| ECG | — | Yes |
| Sleep tracking | — | Yes |
| Sensors | accelerometer | heart rate, SpO2, accelerometer |
| Sports & navigation | ||
| Multisport / triathlon mode | — | Yes |
| Connectivity | ||
| Bluetooth | 4 | 5 |
| Platform | ||
| Works with | — | iOS, Android |
