This is a come-on that appears to offer free hearing aid as compensation for participation in a 'study'. In reality, you are required to purchase a hearing device and they don't give a $#*! about you after that. Then, after dodging you for three weeks, you are unable to secure a refund.
Utter bull$#*!.
Tip for consumers: Avoid these scammers
Products used: None. I don't pay for my own participation