Product weight: 205g (net weight), 252g (gross weight) Product size: 138 * 38 * 80mm Size of color box: 156 * 41 * 85mm Packing size: 44 * 32.2 * 35cm instructions Product A. B key Press and hold the power on button for the first time, and press and hold the power off button for the second time. A key Operation of setting function Click A for the first time to display the year. Click A for the second time to display the month and date, Click A for the third time to display the time. B key From the operation date to the adjustment of the clock. The lighting of the book lamp is controlled by a magnetic switch, Open the back cover for the first time and turn on the light Then turn on the colorful light cycle gradient, The color of the colorful lights can be fixed by closing and quickly opening them during the gradual change, After fixing the light color, close the back cover and quickly open it again, it is a colorful circular light Close the book lamp to turn off the light.