There are a wide range of commercially available devices that use paper based overlays. Devices range from 2 to 128 keys. Overlays with pictures, symbols or words placed are placed over the keys to show which one will say which message.
Some of these devices have several ‘levels’ with different messages on each so the device can be used in different situations without requiring re-recording. Different levels might be used for example, for work, respite, going out, going to the pub, shopping; or might be used by different users. A separate overlay will be made for each level.
Some devices allow the AAC speaker to change levels themself though it may be difficult for some individuals to do so.
Partner Four Plus
Go Talk 9+