UNIT-4 was released in 2026. It includes X04 and charges by USB-C. UNIT-4 (Model: MKI) was released in 2023. It includes X02 and charges by DC. Both work with X04 and X02.
Key facts
| UNIT-4 | UNIT-4 | |
|---|---|---|
| Model | MKII | MKI |
| Released | 2026 | 2023 |
| Transmitter in the box | X04 | X02 |
| Also works with | X04 and X02 | X04 and X02 |
| Charging | USB-C | DC |
| In the box | two UNIT-4, 2 USB-C power supplies, 1 carry case, 1 X04 | two UNIT-4, 2 power supplies, 2 protective pouches, 1 X02 |
UNIT-4 is sold in black and white. The sound, the buttons, and the 20 hour battery are the same.
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