Why is LBT-TWS15 better than K20i?
- Active noise cancellingYes · K20i: No
- Charging time1.5 h vs 2 h+33%
Why is K20i better than LBT-TWS15?
- Battery life5.5 h vs 10 h+82%
- Driver size10 mm vs 13 mm+30%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | — |
| Driver type | Dynamic | — |
| Driver size | 10 mm | 13 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 | Yes | No |
| Transparency / ambient mode | Yes | — |
| Microphones | — | 2 |
| Noise reduction for calls | — | Yes |
| Battery & charging | ||
| Battery life | 5.5 h | 10 h |
| Total with charging case | — | 36 h |
| Charging time | 1.5 h | 2 h |
| Quick charge (claimed) | — | 10 min → 2 h |
| Fast charging support | — | Yes |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 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 | Yes |
| Low-latency game mode | — | Yes |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Earbud weight (each) | 3.3 g | 3.3 g |
| Protection rating | — | IPX5 |
| Water resistance (IPx) | — | IPx5 |
| Colours | — | Jet Black |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
