We are developing an active implantable medical device, named CaverSTIM, to restore the erectile function of post-prostatectomy patients or others non-responsive to oral drugs (e.g. Viagra or Cialis). To achieve erection, these patients resort to intrapenial injections of vasodilators or penile implants, which are quite problematic and outdated, but the only option for a large population (approx. 1B existing market). CaverSTIM offers a far better therapeutic modality for an under-addressed market.