TINNZTES USB Powered 7 Colors Changing Fiber Optic Christmas Tree with a Star on Top TINNZTES USB fiber color changing Christmas tree. Powered by USB. 7 Color changing when you powered it. With Suction Cup in the bottom, you can stick it to your desk to hold it. This tree brings the holiday cheers right directly to your desktop. It smoothly changes from one color to the other colours to have a rainbow effect. Suitable for Home Party, Bedroom, Holiday Decoration Lighting etc.