Why is Light V2 better than 4?
Light V2 has no measurable advantages in this pair.
Why is 4 better than Light V2?
- Weight3.7 g vs 3 g+23%
Specifications
Side by side
| Design & durability | ||
| Weight | 3.7 g | 3 g |
| Water resistance | — | 10 ATM |
| Water rating (maker) | — | 10 atm / 100 m |
| Battery | ||
| Battery life (smartwatch mode) | 7 days | 7 days |
| Health sensors | ||
| Optical heart rate | Yes | Yes |
| Blood oxygen (SpO2) | Yes | Yes |
| ECG | — | Yes |
| Skin temperature | Yes | — |
| HRV tracking | Yes | — |
| Sensors | heart rate, SpO2, accelerometer | SpO2, accelerometer |
