Rotate mode: set the time (0-99 minutes) by rotating the outer ring, activate and stop with one button. Clockwise the time increases, counter-clockwise decreases time. Three reminder modes: loud (85-95dB), normal (60-80dB) and silent mode, in the silent mode, the screen will keep flashing to remind you after the time is up. Operation is simple: 100% easy to use. Simply twist to set the time. Increase the time clockwise, reduce the time counterclockwise. Large clear numbers: large LCD display makes the numbers clear. Easy to read. 1 x kitchen timer, powered by three 1.5 V AAA batteries (not included)