The product A.B key is pressed for the first time to turn on, and the second time is to be pressed to turn off. The A key is used to set the function operation, and the year is displayed when the A key is clicked for the first time. Click the A key for the second time to display the month and date, and click the A key for the third time to display the time. The B key is used to adjust the year, month, day and clock.The book light is controlled by a magnetic switch. When the back cover is turned on for the first time, the book light is turned on and then turned on. The colorful light is cyclically gradual. When the colorful light is gradual, close and quickly turn it on to fix the light color. After fixing the light color, close the back cover and then Turn it on quickly and turn on the colorful circular light. Close the book light and turn off the light.Built-in 1200Mah large capacity rechargeable battery, long working time. Along with a charging cable, which can charge from your computer, power bank or any device with a USB port.Dont worried about power.This must be the most exquisite alarm clock you have ever seen.The full-screen mirror design is stylish and simple, which can reflect its beauty at any time while listening to music. It is not only a clock, but also a great decoration for your bedroom.colour: blackMaterial: ABSPackage Contents:1 x Alarm clock1 x USB cableOnly the above package content, other products are not included.Note: Light shooting 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.