[volemo]

That seems a ~~wired~~ weird compromise to me: you get the downsides of Bluetooth (inherent latency, potential codec quality loss, spectrum congestion — I occasionally experience interference and dropouts in crowded areas) but still have a wire hanging from your head and another battery to keep charged. :/

[dbrgn]

Latency doesn't matter for music and Fiio supports both LDAC and aptX.

Keeping the battery charged is a weak point though, agreed.