The beta release of Android O includes updates to the accessibility tools services, settings and APIs that help users access the mobile operating system.
TalkBack, enables a visually impaired user to interact with their device using touch and spoken feedback. With BrailleBack, blind users can connect their phone to a handheld, refreshable braille display via Bluetooth. Switch Access is an alternative to the touch screen for users with limited mobility.
One new feature coming out on Android O will be to adjust the “accessibility” volume on TalkBack separately from media volume. For example, if a user wants to listen to a video without interruption from the TalkBack feature, they can turn down the accessibility volume while leaving the video volume on.