Usage Tips:Easy to learn and teach: This is a professional wall clock for children's learning. With each quarter broken down into a specific color, so kids can easily 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. 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 easy way 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. Silent Sweep Movement: This children's analog wall clock has a sturdy, durable design and a premium quality 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 away! Long Battery life: Low-power 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 guarantee the accuracy of the time. color:Yellow / Green / Pink / Blue Material:Metal + Plastic size: 4.8 x 8 x 9cm Package Contents: 1 x Alarm clock Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.