Why is Air 2 better than HP-C28BT?
- Battery life9 h vs 3.5 h2.6×
- Hi-res codec (LDAC / aptX HD / LHDC)Yes · HP-C28BT: No
- Water resistance (IPx)IPx7 vs IPx4+75%
- LDACYes · HP-C28BT: No
- Driver size10 mm vs 6.1 mm+64%
Why is HP-C28BT better than Air 2?
HP-C28BT has no measurable advantages in this pair.
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Driver type | — | Dynamic |
| Driver size | 10 mm | 6.1 mm |
| Lowest frequency | — | 20 Hz |
| Highest frequency | — | 20,000 Hz |
| Impedance | — | 16 Ω |
| Sensitivity | — | 90 dB |
| Hi-Res Audio | Yes | — |
| Adjustable equaliser | Yes | — |
| Noise control | ||
| Microphones | 4 | — |
| Noise reduction for calls | Yes | — |
| Battery & charging | ||
| Battery life | 9 h | 3.5 h |
| Total with charging case | 40 h | — |
| Battery capacity | 40 mAh | — |
| Charging time | 1.5 h | 1.5 h |
| Fast charging support | Yes | — |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.3 |
| Bluetooth codecs | LDAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | Yes | No |
| aptX | No | No |
| LDAC | Yes | No |
| USB-C | Yes | Yes |
| Low-latency game mode | Yes | — |
| Smart & streaming | ||
| Companion app | Yes | — |
| Design & build | ||
| Earbud weight (each) | — | 3 g |
| Protection rating | IPX7 | IPX4 |
| Water resistance (IPx) | IPx7 | IPx4 |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | — | Yes |
