vs
9.3Noise control & calls3.0
Why is Choice Earbuds S7 better than C40i?
- Active noise cancellingYes · C40i: No
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · C40i: No
- Total with charging case36 h vs 21 h+71%
- Number of drivers2 vs 12×
- LDACYes · C40i: No
Why is C40i better than Choice Earbuds S7?
- Charging time3 h vs 1 h3×
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Open-back |
| Driver type | — | Dynamic |
| Driver size | — | 12 mm |
| Number of drivers | 2 | 1 |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 22 Ω |
| Sensitivity | 91 dB | — |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | Yes | No |
| Battery & charging | ||
| Battery life | — | 7 h |
| Total with charging case | 36 h | 21 h |
| Charging time | 3 h | 1 h |
| Quick charge (claimed) | — | 10 min → 5 h |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| Bluetooth codecs | LDAC, AAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | No | No |
| LDAC | Yes | No |
| Multipoint (two devices) | — | Yes |
| USB-C | Yes | Yes |
| Low-latency game mode | Yes | — |
| Design & build | ||
| Earbud weight (each) | — | 5.8 g |
| Protection rating | IP54 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Dust protection (IP) | 5 | — |
| Colours | — | Midnight Black, Desert Bronze, Clarity Black |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | — | Yes |
