How can I turn on text to speech in Android? I'm not an Android user and I'm stumped. I've got a friend who wants to turn on text-to-speech on his new phone.

His old phone has a "speech" icon on the screen. When he taps that and then taps text, the text is read out loud. In the screen shot below, the "speech" icon appears near the bottom of the screen between the Música and myMetro apps. 



I can't find a way to turn this option on on his new Android phone. Even worse, I haven't been able to find that "speech" icon anywhere on the internet. What is that and how do I turn it on? Help!
Found it! The option is "Select to Speak" but it wasn't available in the version of Google TalkBack installed on the phone. I had to download a new version of Google TalkBack and then the option was there. Thanks to "kirodge" for pointing me to TalkBack.