Clear dial: 4.5 inches. The colourful dial and minute scale can not only attract children's attention, but also as a good tool for learning time. We have been updated to the alarm clock, and the button behind the watch is reinforced, so there is no longer loose drop. 9D low-frequency pulse horn oriented acoustic structure design, superimposed low-frequency energy to make the sound 9D surround soft and strong, not to worry about the alarm clock call not wake up Soft light night light easy recognition night light function needs to gently the back of the white button oh - Good energy efficiency class: USB charging farewell battery trouble charging fast and convenient lasting silent use of small power consumption.Good decoration for house, bedside table, desk, table, kitchen, school, office Good gift for children: This digital alarm clock is a wonderful gift for children aged 2-10 years on occasions such as: birthdays, Christmas, new semester, etc. He enjoy your child.This is a big birthday and Christmas present for those who care. Product name:Metal early education alarm clock Charging method:USB charging Movement:Upgraded silent scanning movement Simple style:modern/cartoon Colour:As Shown Material:Metal Package Contents: 1 * Alarm Clock 1 * USB cable 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.