I think that Jerry Lewis had one implanted
and used a wireless remote to vary intensity.
He was a spokesperson for the product's positive results.
He had back pain (to say the least) from many years of pratfalls and tumbles in his comedic/acting career.
He injured himself many times during that period,
and it affected him severely as he grew older.
He mentioned the stimulator more than once, during his annual telethons (for Muscular Dystrophy.... or Cerebral Palsy- I forget which).