This is a decoration light which designed by human breath frequency,make you feel comfortable and peaceful.Put the power line into USB interface,press the front part and the light is on.Three grades of the light adjusting function,the first is night light function,second is sleeping function,third is light off function.
Sleeping function: The light is changing from dark to bright circulatory,like someone company with you and breath together in the dark.There are 5colors for selection.Power: DC 5V