vs
4.3Battery6.9
8.3Build & features7.1
Why is 4XD1R31390 better than AeroFit 2 AI Assistant?
- Driver size12.2 mm vs 11.5 mm+6%
Why is AeroFit 2 AI Assistant better than 4XD1R31390?
- Battery life7 h vs 8.5 h+21%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Open-ear |
| Ear cup design | — | Open-back |
| Driver type | — | Dynamic |
| Driver size | 12.2 mm | 11.5 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | 16 Ω |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 8.5 h |
| Battery life with ANC | 4 h | — |
| Total with charging case | — | 35 h |
| Charging time | 1 h | 1 h |
| Wireless charging (case) | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| Bluetooth codecs | — | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | Yes |
| aptX | — | No |
| LDAC | — | Yes |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Design & build | ||
| Weight | 47 g | — |
| Earbud weight (each) | — | 10 g |
| Protection rating | IP55 | IP55 |
| Water resistance (IPx) | IPx5 | IPx5 |
| Dust protection (IP) | 5 | 5 |
| Colours | — | Jet Black, Pearl White, Sage Green |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
