1. Silent and Adjustable Alarm: Thanks to the sophisticated internal structure, it operates almost silently, allowing you to focus on your work without distractions. The alarm volume can be set to active/inactive, and the ringing duration can be adjusted to 3 seconds or 60 seconds. 2. Practical Features for Enhanced Efficiency: The time progression is visually displayed like an hourglass, making it easy to understand for people of all ages. Unlike a digital timer, you don't need to check the numbers—just glance at the countdown timer to see how much time remains. 3. Extremely Easy to Use: Simply turn the knob to set the time. Rotate it clockwise to extend the time and counterclockwise to shorten it. To turn off the alarm, gently turn it clockwise and then back to zero. 4. Fun Pattern Design: This visual timer is for classrooms or as a kitchen timer for cooking. The rainbow pattern sparks children's interest and helps them complete assigned tasks more easily.