MDHearingAid AIRhttp://www.mdhearingaid.com/air/ - The MDHearingAid AIR was developed to meet the needs of those people who had more challenging hearing losses or in more challenging hearing environments. It uses all digital technology similar to that what's found on the expensive $1,000 to $3,000 hearing aids. With its advanced technology we see features such as dynamic compression, which makes loud sounds softer and makes softer sounds more hearable or audible. The MD Hearing Aid AIR has three programs and these programs are designed to meet the configuration of the most common types of hearing loss and the most common hearing environments. For example, if someone has mainly a high frequency hearing loss, they're able to engage program three where the majority of the amplification is in the high frequencies that they're missing. In addition, program four is a telecoil, which allows them to seamlessly patch into the sound from their iPhone or their land line or other public places where a looped sound environment is being used, such as movie theaters, churches, so that the clarity in these setting is unparalleled as compared to a hearing aid without a telecoil.