If voice control is turned on the Mic icon is present on the status bar of the M100, and the M100 is always listening for the ‘Voice On’ command. If you say ‘Voice On’, the Mic will go from grey to green showing the M100 is now listening for a voice command. By default, after 15 seconds of not hearing any voice commands, the Mic icon will return to grey, and the M100 will stop listening for any command other than ‘Voice On’ and wait to be re-enabled. The 15 second default timeout can be adjusted through the Settings application under Voice. The range is in seconds with zero (0) being always listening. The list of recognized voice commands is growing constantly and may vary from one program to another.