Silent Sweep Movement: This children's analog wall clock has a sturdy, durable design and a silent sweep movement, saving you and the rest of the family from the annoying ticking sound. The quiet design is great for classrooms as well, as it keeps distractions ! Early Childhood Development: We designed the clock to help when we were teaching our own child to learn how to read time. For kids to learn time efficiently our design had to be easy to understand, labeling each quarter with a different color would provide an for your child to quickly create an association between the numbers and where they are. Studies show certain colors greatly affect a child's mood. Every detail of this clock has been optimized to have a strong learning impact. Easy to learn and teach: This is a wall clock for children's learning. With each quarter broken down into a specific color, so kids can learn terms like "0' clock 00", "Quarter Past", "Half Past", and "Quarter To". Besides, the 5 minute increments around the outside can give great help to tell accurate time. Long Battery life: Low- quartz movement requires one AA battery(not included), please use normal carbon battery rather than alkaline battery which could work for a long time and the accuracy of the time.