It's only for looks!
I used to own the Taylor/Klein half acoustic bass, the fist one AB1, i e an acoustic with a piezo pickup stuck into it, and it was unbelievably expensive. I thought I could make something acoustic out of it. But no, the worst ergonomics I've tried on any bass (neck dived like hell). POS. And not any low note heard by any stretch. The only thing that works acoustically is the Mexican Guitarrón. It looks like you're wearing a small bath tub on you. The low A can be detected faintly, but the low E NO! That was the root for Ernie Ball to produce these stupenduous things. Tacoma and Earthwood and whatever they're called.
If find all of these instruments immensely excessive and over the top redundant. Think of it: It is the only instrument which is a copy of an instrument that was an electric copy of an acoustic upright in the first place! You did the electric bass as a copy of an acoustic (as you did with guitar) but then you did an acoustic version of that electric one again....

Never ever heard such baloney before. You must plug it in but that counters everyhing it's supposed to do. If you turn it up the slightest, it will feed back in the lowest frequencies, and then just must EQ so much all bottom is gone anyway. Frankly, these instruments are the most one out there, that leaves me with the largest question mark upon my face. Why? I e when considering "gadgets in music industry that one thinks are absolutely useless".
Get a proper acoustic upright, or a Bajo Sexto/Guitarron OR
keep your electric bass as it is. Preferably the latter. You'll save a bunch of money anyway.
It would only have some merit if it sounded just exactly like an upright when plugged in, but not even that it manages.
The Klein/Taylor:
The Mexican Guitarrón: