Built-in battery: The desk lamp has a built-in rechargeable battery, which can work by battery or USB data cable Designed for reading and writing Anti-blue light/no flicker/digital display/dimming and color adjustment No visible flicker in mobile phone test Can be adjusted at any time Use constant current stable dimming solution to maintain stable output Keep your eyes safe from harm No blue light hazards Soft light and eye protection Passed blue light hazard safety certification Multi-angle adjustment As the child grows in age and height, the height can be adjusted to suit the child. With a rigorous structure, the child can focus on learning and say goodbye to bad sitting posture Colour:White Material:Plastic Package Contents: 1x desk lamp 1x data cable 1x English manual 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