vs
4.8Battery5.5
Why is Free 2S better than AONIC 215 Gen 2 SE21DYBK+TW2-A?
- Water resistance (IPx)IPx7 vs IPx4+75%
- Bluetooth version5.2 vs 5+4%
- Charging time1.5 h vs 2 h+33%
Why is AONIC 215 Gen 2 SE21DYBK+TW2-A better than Free 2S?
- Battery life7 h vs 8 h+14%
- aptXNo · Free 2S: Yes
Specifications
Side by side
| Sound | ||
| Fit | In-ear | — |
| Driver type | — | Dynamic |
| Lowest frequency | — | 22 Hz |
| Highest frequency | — | 17,500 Hz |
| Impedance | — | 17 Ω |
| Sensitivity | — | 107 dB |
| Spatial / 3D audio | Yes | — |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Transparency / ambient mode | — | Yes |
| Microphones | 4 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 8 h |
| Total with charging case | 30 h | — |
| Battery capacity | 40 mAh | — |
| Charging time | 1.5 h | 2 h |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 5 |
| Bluetooth codecs | SBC | aptX, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | Yes |
| LDAC | No | No |
| USB-C | Yes | Yes |
| Latency | 60 ms | — |
| Low-latency game mode | Yes | — |
| Design & build | ||
| Weight | — | 21 g |
| Protection rating | IPX7 | IPX4 |
| Water resistance (IPx) | IPx7 | IPx4 |
| Features | ||
| Hands-free calls | — | Yes |
