You are downloading the System Speech AppX file v18.104.22.168 for Windows Phone. System Speech is a free and useful Productivity app: System Speech, Speak text Using installed voice system. Use it wherever you go, On your school, Home or Street, For Example when you can't speak you ... You can now download the offline AppX file to install & try it.
Download Locations for System Speech 22.214.171.124 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline System Speech AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.