Not only powered by USB cable (included), compatible with computer, laptop, power bank or any other with USB adapters, but supported by 3 AAA batteries (not included).
Warm Note:
1.Please do not debug the switch button too quickly.
2.If the diaplay base is powered by batteriesit,it only can light; lf light and rotation are reuired, you need to plug it into the power.
3.In order to maintain the rotating function, there may be a little sound, which is normal, you can keep the light be stable when sleeping.