Why is K20i better than A1?
- Battery life10 h vs 9 h+11%
- Driver size13 mm vs 6 mm2.2×
Why is A1 better than K20i?
- Water resistance (IPx)IPx5 vs IPx8+60%
- Total with charging case36 h vs 40 h+11%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | — | Dynamic |
| Driver size | 13 mm | 6 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Active noise cancelling | No | No |
| Microphones | 2 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 10 h | 9 h |
| Total with charging case | 36 h | 40 h |
| Battery capacity | — | 50 mAh |
| Charging time | 2 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 | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| USB-C | Yes | — |
| Low-latency game mode | Yes | — |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | 3.3 g | — |
| Protection rating | IPX5 | IPX8 |
| Water resistance (IPx) | IPx5 | IPx8 |
| Colours | Jet Black | — |
| Features | ||
| Touch controls | Yes | — |
| Hands-free calls | Yes | — |
