So , as we discussed , we have to switch on switch off whenever we want. And so , we have buttons and using L_C_D_ , or like you can use this  jog wheel and select which ever option on the L_C_D_ , and then do on and off.  Then you ha you'll have volume control. So , you you can press these buttons to increase or decrease the volume.
And we have some L_C_D_ controls. Like , m switching the L_C_D_ display if you want to use L_C_D_ , or you don't want you can just use normal button.
Mm-hmm.
And we have speech recognition. Here you have microphone , and then it date records your voice , and then it try to recognise.