Acer Iconia Tab 10 A3-A40 - Manual (Page 29)

Going online - 29
5. When you have finished composing your message, tap .
Voice Search
With voice actions, you can send emails, find directions to locations,
search the internet and even send a note to yourself using your own
voice. In Chrome, tap the microphone icon in the address bar for voice
searches. If this is the first time you have used this function, tap
Allow. When the Speak now prompt displays, state your command or
query.
Note
Voice Search is available only in selected regions.