Using the USB C connection for wired playback lets the Charge 6 deliver lossless, hi res audio up to 24 bit 96 kHz, giving a wider soundstage, more detail and tighter low end than typical Bluetooth streams for listeners who care about squeezing out extra fidelity.
Reviews report that wired sources fed through the Move 2’s USB-C line-in sound clean and in sync, with no noticeable audio delay, although using it this way can disable the onboard microphone for calls.