Adding USB input is a significant cost increase.
Most people are dimwitted and don't realize audio over bluetooth is butchered so they're all about it.
I wouldn't touch this product with a ten foot pole. Want an entry level do-it-all box? PS audio sprout. It does everything. Speaker amp. Headphone amp. Phono preamp, USB input with internal DAC, Bluetooth, folds your clothes, gives massages, etc. $800. That's as cheap as I'd go. Otherwise just buy a freakin boombox man.