Stopwatch Voice and no Voice

Stopwatch app counts seconds with voice or without voice.
There are five functions start, stop, reset , pause and voice/non-voice.
The user want to start stopwatch click 'Start' button.
The user want to stop stopwatch click 'Stop' button.
The user want to reset stopwatch click 'Reset' button.
The user want to pause stopwatch click 'Pause' button.
The Stopwatch app count with Voice by default, when the user want without voice click 'Voice' button. The user changes her/his mend clicks 'Non-Voice' button.
Stopwatch shows hh:mm:ss (two digit hours, two digit minutes and two digit seconds 00:00:00)