Why is P31i better than Sleep A20?
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · Sleep A20: No
- Water resistance (IPx)IPx5 vs IPx4+25%
- Highest frequency40,000 Hz vs 20,000 Hz2×
- LDACYes · Sleep A20: No
- Bluetooth version6.1 vs 5.3+15%
Why is Sleep A20 better than P31i?
- Battery life10 h vs 14 h+40%
- Total with charging case50 h vs 80 h+60%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 40,000 Hz | 20,000 Hz |
| Impedance | — | 16 Ω |
| Spatial / 3D audio | Yes | — |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | Yes |
| Noise control | ||
| Active noise cancelling | Yes | — |
| Adaptive ANC | Yes | — |
| Noise reduction (claimed) | 52 dB | — |
| Microphones | 6 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 10 h | 14 h |
| Battery life with ANC | 8 h | — |
| Total with charging case | 50 h | 80 h |
| Charging time | — | 1.5 h |
| Quick charge (claimed) | 10 min → 3,5 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 6.1 | 5.3 |
| Bluetooth codecs | LDAC, 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 |
| Design & build | ||
| Earbud weight (each) | — | 3 g |
| Protection rating | IP55 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Dust protection (IP) | 5 | — |
| Colours | Midnight Black, Pearl White, Light Blue, Rose Gold | — |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | — |
