USB Powered 7 Colors Changing LED Crystal Christmas tree with star top, LED Night Light Scope of application: notebook computers, desktop computers Using three red, green, blue LED lights glowing with IC automatic control, by the red, green, blue three colors into colorful colors. Power consumption is less than 90mA, save electricity and safe, good stability, long service life. Just put the USB plug connected to the PC or laptop USB port. The call waiting type USB power cord, can easily break up, and under the base is equipped with three AG13 button batteries, dial the USB power supply can be used alone.