Why is Pi7 S2 better than Free 2S?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Free 2S: No
- aptXYes · Free 2S: No
- Charging time1 h vs 1.5 h+50%
Why is Free 2S better than Pi7 S2?
- Battery life5 h vs 7 h+40%
- Water resistance (IPx)IPx4 vs IPx7+75%
- Total with charging case21 h vs 30 h+43%
- Bluetooth version5 vs 5.2+4%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | 9.2 mm | — |
| Lowest frequency | 10 Hz | — |
| Highest frequency | 20,000 Hz | — |
| Spatial / 3D audio | — | Yes |
| Noise control | ||
| Active noise cancelling | No | — |
| Transparency / ambient mode | Yes | — |
| Microphones | — | 4 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 5 h | 7 h |
| Total with charging case | 21 h | 30 h |
| Battery capacity | — | 40 mAh |
| Charging time | 1 h | 1.5 h |
| Quick charge (claimed) | 15 min → 2 h | — |
| Fast charging support | Yes | — |
| Wireless charging (case) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5 | 5.2 |
| Bluetooth codecs | aptX Adaptive, aptX, AAC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | Yes | No |
| LDAC | No | No |
| USB-C | Yes | Yes |
| Latency | — | 60 ms |
| Low-latency game mode | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Design & build | ||
| Earbud weight (each) | 7 g | — |
| Protection rating | IP54 | IPX7 |
| Water resistance (IPx) | IPx4 | IPx7 |
| Dust protection (IP) | 5 | — |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
