Grandstream Networks GXV3275 Administration Manual page 36

 Default. Select input method
 Android keyboard. Set up whether to use Android keyboard or not, and configure Android
keyboard including sound, auto-correction, word suggestion and so on.

Text-to-speech output. Set up and configure the text to speech settings.
 Prefer engine. Select the engine type. The default engine is Pico TTS.
 Speech rate. Adjust the speech rate.
 Listen to an example. Play and listen the example of speech synthesis.

Pointer speed. Adjust the sensitivity of the mouse pointer in those devices.
Firmware Version 1.0.3.46 GXV3275 Administration Guide Page 34 of 117