vs
3.1Noise control & calls8.7
Why is Rockerz 255 Pro better than P31i?
- Water resistance (IPx)IPx7 vs IPx5+40%
Why is P31i better than Rockerz 255 Pro?
- Active noise cancellingNo · Rockerz 255 Pro: Yes
- Bluetooth version5 vs 6.1+22%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | Dynamic | Dynamic |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 40,000 Hz |
| Impedance | 255 Ω | — |
| Spatial / 3D audio | — | Yes |
| Hi-Res Audio | — | Yes |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Active noise cancelling | No | Yes |
| Adaptive ANC | — | Yes |
| Noise reduction (claimed) | — | 52 dB |
| Microphones | — | 6 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | — | 10 h |
| Battery life with ANC | — | 8 h |
| Total with charging case | — | 50 h |
| Battery capacity | 500 mAh | — |
| Quick charge (claimed) | — | 10 min → 3,5 h |
| Fast charging support | Yes | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5 | 6.1 |
| Bluetooth codecs | — | LDAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | — | Yes |
| aptX | — | No |
| LDAC | — | Yes |
| Multipoint (two devices) | — | Yes |
| Design & build | ||
| Protection rating | IPX7 | IP55 |
| Water resistance (IPx) | IPx7 | IPx5 |
| Dust protection (IP) | — | 5 |
| Colours | — | Midnight Black, Pearl White, Light Blue, Rose Gold |
| Features | ||
| Touch controls | — | Yes |
| Hands-free calls | — | Yes |
