Assistive listening devices, visual alert signalers, TTY/TDD, hearing aid batteries, deaf and hard of hearing books, videos and novelties.

By putting the customer's needs first, we have grown to become the world's largest manufacturer of TTYs. Today, our TTYs are recognized worldwide as the standard for excellence in text telecommunications. In addition we produce amplified phones, signalers, and other equipment for people who are deaf and hard of hearing.