First things first...here is a list of the devices compatible with the upgrade
The last big update came with Speak Selection and Speak Screen options. iOS 10 now provides the option to highlight words and/or sentences with the speak selections!
2) Typing Feedback
Now, you can choose a feature that will allow you to hear words aloud as you type them.
3) Hold to Speak Predictions
The free word predictions is already great, but with the "Hold to Speak Predictions" feature, you can hear the word before you use it!
For more information on how to find and set up these features, check out the YouTube video below.