vs
3.8Battery8.5
Why is QuietComfort Ultra Earbuds (2nd Gen) better than Comfo Flex?
- aptXYes · Comfo Flex: No
Why is Comfo Flex better than QuietComfort Ultra Earbuds (2nd Gen)?
- Battery life6 h vs 10 h+67%
- Hi-res codec (LDAC / aptX HD / LHDC)No · QuietComfort Ultra Earbuds (2nd Gen): Yes
- Total with charging case24 h vs 40 h+67%
- Water resistance (IPx)IPx4 vs IPx5+25%
- LDACNo · QuietComfort Ultra Earbuds (2nd Gen): Yes
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Open-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 40,000 Hz |
| Sensitivity | — | 90 dB |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Adaptive ANC | Yes | — |
| Transparency / ambient mode | Yes | — |
| Microphones | 4 | — |
| Battery & charging | ||
| Battery life | 6 h | 10 h |
| Battery life with ANC | 4 h | — |
| Total with charging case | 24 h | 40 h |
| Battery capacity | — | 70 mAh |
| Charging time | 1 h | — |
| Fast charging support | Yes | — |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| Bluetooth codecs | aptX | LDAC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | Yes |
| aptX | Yes | No |
| LDAC | No | Yes |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | 10 g | — |
| Protection rating | IPX4 | IP55 |
| Water resistance (IPx) | IPx4 | IPx5 |
| Dust protection (IP) | — | 5 |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
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