State in online ad that there is a 90 day guaranteed return policy. No invoice enclosed with device that looks like worth $5 that they charged $69.97. Their customer support email address that they give on the online invoice is invalid. The return policy link at bottom gives impossible to follow instructions to return and states there is a 25% environmental waste fee for returning a piece of material that goes under the chin and around the top of the head. They state that it is contaminated with TB, Malaria and strep - a giveway that they... read full review »