vs
9.6Sound5.1
7.2Noise control & calls6.2
4.6Battery6.7
3.9Build & features7.0
Why is FreeBuds Pro 4 better than AeroFit 2 Pro?
- Highest frequency48,000 Hz vs 20,000 Hz2.4×
- Earbud weight (each)5.8 g vs 10.5 g+81%
- Lowest frequency14 Hz vs 20 Hz+43%
Why is AeroFit 2 Pro better than FreeBuds Pro 4?
- Battery life with ANC5 h vs 24 h4.8×
- Charging time2.5 h vs 1 h2.5×
- Water resistance (IPx)IPx4 vs IPx5+25%
- Bluetooth version5.2 vs 6.1+17%
- Total with charging case33 h vs 34 h+3%
- Battery capacity55 mAh vs 60 mAh+9%
- Driver size11 mm vs 11.8 mm+7%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Open-ear |
| Ear cup design | Closed-back | Open-back |
| Driver type | Planar magnetic | Dynamic |
| Driver size | 11 mm | 11.8 mm |
| Number of drivers | 2 | — |
| Lowest frequency | 14 Hz | 20 Hz |
| Highest frequency | 48,000 Hz | 20,000 Hz |
| Impedance | — | 16 Ω |
| Sensitivity | — | 92 dB |
| Spatial / 3D audio | — | Yes |
| Head tracking | — | Yes |
| Hi-Res Audio | Yes | Yes |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | Yes |
| Transparency / ambient mode | Yes | — |
| Microphones | — | 4 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 7 h | 7 h |
| Battery life with ANC | 5 h | 24 h |
| Total with charging case | 33 h | 34 h |
| Battery capacity | 55 mAh | 60 mAh |
| Charging time | 2.5 h | 1 h |
| Quick charge (claimed) | — | 10 min → 3,5 h |
| Fast charging support | Yes | Yes |
| Wireless charging (case) | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 6.1 |
| Bluetooth codecs | LDAC, AAC, SBC | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | Yes |
| aptX | No | No |
| LDAC | Yes | Yes |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Earbud weight (each) | 5.8 g | 10.5 g |
| Protection rating | IP54 | IP55 |
| Water resistance (IPx) | IPx4 | IPx5 |
| Dust protection (IP) | 5 | 5 |
| Colours | — | Matte Black, Gloss White, Matte Purple, Gloss Blue |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
