HG HGROPE Kitchen Timer, Stainless Steel Egg Shaped Mechanical Rotating Alarm

Operations 1Clockwise rotate to the end (55 - 60 Min pt.). 2counterclockwise rotate to time pt. You want to set up.If you want to set fixed time to 25 Min, just rotate in counterclockwise direction to the 25 Min pt.. 3When Time's up, it rings automatically.