Set your time and start to count down.
Use your time more effective with Black White Timer.
When started timer count down white screen turn to black simultaneously with time.
If the screen will be full black it means time is up.
Start timer before study for manage your time more efficiency.
Hold screen 2 second for pause or exit.
Use your time more effective with Black White Timer.
When started timer count down white screen turn to black simultaneously with time.
If the screen will be full black it means time is up.
Start timer before study for manage your time more efficiency.
Hold screen 2 second for pause or exit.
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