Your inner core is where majority of the Chronic LBP research supports working.
Transverse Abdominis Dysfunction
Numerous studies demonstrated timing and thickness change deficits in
subjects with LBP and athletes with groin pain
When respiration is challenged, TrA is the first muscle ...
I can find no evidence that this device has ever been tested clinically against a placebo control, let alone shown effective. It is not FDA approved as a medical device.
The descriptions of how it works are entirely bogus and do not relate to any known neuroscience of pain or anything else.
Seems like a complete scam, though even scams can give a placebo ...