Why is KH-BIZ70T better than RZ-S30W?
- Battery life9 h vs 7.5 h+20%
- Bluetooth version5.2 vs 5+4%
Why is RZ-S30W better than KH-BIZ70T?
- Earbud weight (each)4.6 g vs 4 g+15%
Specifications
Side by side
| Sound | ||
| Fit | In-ear | In-ear |
| Ear cup design | — | 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 | ||
| Active noise cancelling | Yes | — |
| Transparency / ambient mode | Yes | Yes |
| Battery & charging | ||
| Battery life | 9 h | 7.5 h |
| Battery life with ANC | 7 h | — |
| Charging time | 2 h | 2 h |
| Connectivity | ||
| Wireless | Yes | Yes |
| Bluetooth version | 5.2 | 5 |
| Bluetooth codecs | AAC, SBC | AAC, SBC |
| Hi-res codec (LDAC / aptX HD / LHDC) | No | No |
| aptX | No | No |
| LDAC | No | No |
| Multipoint (two devices) | Yes | — |
| USB-C | — | Yes |
| Design & build | ||
| Earbud weight (each) | 4.6 g | 4 g |
| Protection rating | IPX4 | IPX4 |
| Water resistance (IPx) | IPx4 | IPx4 |
| Features | ||
| Touch controls | Yes | Yes |
| Hands-free calls | Yes | Yes |
