Tips for Choosing the Right Roget Pen Hearing Aid Microphone Filter The Phonak Roger Pen is a unique hearing aid that was created by the Swiss company, Phonak. It is an advanced technology that has been designed to help people with hearing loss. It can be used by people with any degree of hearing loss and can be used for both in and out-of-ear use. Read More: https://dailybusinesspost.com/tips-for-choosing-the-right-roget-pen-hearing-aid-microphone-filter/