Why is KH-CRZ40T better than RZ-S30W?
- Water resistance (IPx)IPx5 vs IPx4+25%
Why is RZ-S30W better than KH-CRZ40T?
- Earbud weight (each)4.1 g vs 4 g+2%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | Closed-back | Closed-back |
| Driver type | — | Dynamic |
| Driver size | 6 mm | 6 mm |
| Lowest frequency | 20 Hz | 20 Hz |
| Highest frequency | 20,000 Hz | 20,000 Hz |
| Adjustable equaliser | — | Yes |
| Noise control | ||
| Transparency / ambient mode | — | Yes |
| Battery & charging | ||
| Battery life | 7.5 h | 7.5 h |
| Charging time | 2 h | 2 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.1 | 5 |
| Bluetooth codecs | SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| USB-C | — | Yes |
| Design & build | ||
| Earbud weight (each) | 4.1 g | 4 g |
| Protection rating | IPX5 | IPX4 |
| Water resistance (IPx) | IPx5 | IPx4 |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
