Secura60-Minute Visual Timer, Silent Study Timer for Kids and Adults, Time Management Countdown Timer for Teaching (Starry Sky)

Does this beep or make a noise when the time is 0? Is there a mode where it doesnt make noise?

is there a purple version with a purple wedge? Just got mine & it's purple outside & blue on the time wedge, wish it was described accurately

This timer doesnt seems to work...it literally has only worked once in 5 times of trying. Suggestions?

If I need to change the time it is set for can I turn it counterclock wise without causing damage?