Why is K20i better than A1?
- Water resistance (IPx)IPx5 vs IPx4+25%
- Earbud weight (each)3.3 g vs 4 g+21%
Why is A1 better than K20i?
- Battery life10 h vs 30 h3×
- Charging time2 h vs 1 h2×
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Open-back |
| Driver type | — | Dynamic |
| Driver size | 13 mm | 13 mm |
| Lowest frequency | 20 Hz | — |
| Highest frequency | 20,000 Hz | — |
| Impedance | 16 Ω | 32 Ω |
| Sensitivity | — | 118 dB |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | No | No |
| Microphones | 2 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 10 h | 30 h |
| Total with charging case | 36 h | — |
| Charging time | 2 h | 1 h |
| Quick charge (claimed) | 10 min → 2 h | — |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.3 |
| Bluetooth codecs | AAC, SBC | SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| USB-C | Yes | Yes |
| Low-latency game mode | Yes | — |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | 3.3 g | 4 g |
| Protection rating | IPX5 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Colours | Jet Black | — |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
