The Auditory Communicator is designed for those who cannot select a message from a keyboard because of visual or physical impairments. It will scan through pre-recorded messages at a lowered volume. When you push the switch plate again it plays the chosen message in an amplified volume. The Auditory Communicator features 16 levels with 300 seconds of total recording time, 18 seconds per level. Multiple messages can be recorded on each level. An external switch can be used. Can be used for low vision, visually impaired.