Why is RB-F10DE better than C40i?
- Total with charging case25 h vs 21 h+19%
Why is C40i better than RB-F10DE?
- Charging time2.5 h vs 1 h2.5×
- Earbud weight (each)8.7 g vs 5.8 g+50%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Open-back |
| Driver type | — | Dynamic |
| Driver size | 12 mm | 12 mm |
| Number of drivers | — | 1 |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 22 Ω |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | No |
| Microphones | 2 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 7 h | 7 h |
| Total with charging case | 25 h | 21 h |
| Charging time | 2.5 h | 1 h |
| Quick charge (claimed) | 15 min → 1 h | 10 min → 5 h |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.4 | 5.4 |
| Bluetooth codecs | AAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | Yes |
| USB-C | — | Yes |
| Smart & streaming | ||
| Voice assistant | Google Assistant, Siri | — |
| Design & build | ||
| Earbud weight (each) | 8.7 g | 5.8 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Colours | — | Midnight Black, Desert Bronze |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | Yes | Yes |
