vs
5.0Noise control & calls5.2
4.5Battery8.0
4.6Build & features8.1
Why is Flex Open Earbuds better than Buds 4?
- Microphones4 vs 22×
Why is Buds 4 better than Flex Open Earbuds?
- Active noise cancellingNo · Flex Open Earbuds: Yes
- Battery life7 h vs 11 h+57%
- Total with charging case21 h vs 45 h2.1×
- Hi-res codec (LDAC / aptX HD / LHDC)No · Flex Open Earbuds: Yes
- Water resistance (IPx)IPx4 vs IPx5+25%
- Highest frequency20,000 Hz vs 40,000 Hz2×
- Charging time2 h vs 1.2 h+67%
- Lowest frequency20 Hz vs 15 Hz+33%
Specifications
Side by side
| Sound | ||
| Fit | Open-ear | In-ear |
| Ear cup design | Open-back | — |
| Driver type | Dynamic | — |
| Driver size | 12 mm | — |
| Lowest frequency | 20 Hz | 15 Hz |
| Highest frequency | 20,000 Hz | 40,000 Hz |
| Impedance | 12 Ω | 18 Ω |
| Sensitivity | — | 38 dB |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Transparency / ambient mode | Yes | Yes |
| Microphones | 4 | 2 |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 11 h |
| Battery life with ANC | — | 6 h |
| Total with charging case | 21 h | 45 h |
| Battery capacity | 70 mAh | — |
| Charging time | 2 h | 1.2 h |
| Quick charge (claimed) | 10 min → 1 h | — |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | SBC | LHDC, AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | Yes |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | — |
| USB-C | Yes | Yes |
| Latency | 200 ms | — |
| Low-latency game mode | Yes | Yes |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Companion app | Yes | — |
| Design & build | ||
| Weight | 49 g | 49 g |
| Protection rating | IPX4 | IP55 |
| Water resistance (IPx) | IPx4 | IPx5 |
| Dust protection (IP) | 5 | 5 |
| Colours | Black, Teal, White | — |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
