vs
7.2Noise control & calls4.8
7.9Battery4.4
7.9Build & features5.2
Why is Air Pro 4i better than Flex Open Earbuds?
- Active noise cancellingYes · Flex Open Earbuds: No
- Battery life9.5 h vs 7 h+36%
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Flex Open Earbuds: No
- Water resistance (IPx)IPx5 vs IPx4+25%
- Charging time1 h vs 2 h2×
- LDACYes · Flex Open Earbuds: No
Why is Flex Open Earbuds better than Air Pro 4i?
- Weight51 g vs 49 g+6%
- Driver size11 mm vs 12 mm+9%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | Open-ear |
| Ear cup design | — | Open-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 11 mm | 12 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 12 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Transparency / ambient mode | Yes | Yes |
| Microphones | — | 4 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 9.5 h | 7 h |
| Total with charging case | — | 21 h |
| Battery capacity | — | 70 mAh |
| Charging time | 1 h | 2 h |
| Quick charge (claimed) | — | 10 min → 1 h |
| Fast charging support | — | Yes |
| Wireless charging (case) | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | LDAC, AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | No | No |
| LDAC | Yes | No |
| Multipoint (two devices) | Yes | Yes |
| USB-C | Yes | Yes |
| Latency | — | 200 ms |
| Low-latency game mode | — | Yes |
| Smart & streaming | ||
| Voice assistant | — | Google Assistant, Siri |
| Companion app | — | Yes |
| Design & build | ||
| Weight | 51 g | 49 g |
| Protection rating | IP55 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Dust protection (IP) | 5 | 5 |
| Colours | — | Black, Teal, White |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
