Why is HP-C28BT better than Sleep A30?
- Driver size6.1 mm vs 4.6 mm+33%
Why is Sleep A30 better than HP-C28BT?
- Battery life3.5 h vs 9 h2.6×
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | Closed-back |
| Driver type | Dynamic | Dynamic |
| Driver size | 6.1 mm | 4.6 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Impedance | 16 Ω | 14 Ω |
| Sensitivity | 90 dB | — |
| Noise control | ||
| Active noise cancelling | — | Yes |
| Battery & charging | ||
| Battery life | 3.5 h | 9 h |
| Battery life with ANC | — | 6 h |
| Total with charging case | — | 45 h |
| Charging time | 1.5 h | 1.5 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.3 | 5.4 |
| 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 |
| Smart & streaming | ||
| Companion app | — | Yes |
| Design & build | ||
| Earbud weight (each) | 3 g | 3 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Colours | — | Mist Lilac Special, Lunar White Special, Moonlit White, Mist Green |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
