Why is Free 2S better than Wave Flex?
- Water resistance (IPx)IPx7 vs IPx4+75%
- Charging time1.5 h vs 2 h+33%
Why is Wave Flex better than Free 2S?
- Battery life7 h vs 8 h+14%
- Total with charging case30 h vs 32 h+7%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Driver size | — | 12 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 16 Ω |
| Sensitivity | — | 105 dB |
| Spatial / 3D audio | Yes | — |
| Noise control | ||
| Active noise cancelling | — | Yes |
| Microphones | 4 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 8 h |
| Battery life with ANC | — | 8 h |
| Total with charging case | 30 h | 32 h |
| Battery capacity | 40 mAh | — |
| Charging time | 1.5 h | 2 h |
| Quick charge (claimed) | — | 10 min → 2 h |
| Fast charging support | — | Yes |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 5.2 |
| Bluetooth codecs | SBC | — |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | — |
| aptX | No | — |
| LDAC | No | — |
| USB-C | Yes | — |
| Latency | 60 ms | — |
| Low-latency game mode | Yes | — |
| Design & build | ||
| Protection rating | IPX7 | IP54 |
| Water resistance (IPx) | IPx7 | IPx4 |
| Dust protection (IP) | — | 5 |
| Features | ||
| Hands-free calls | — | Yes |
