A great replica of a Wind powered Turbine, powered by sunlight shining on a solar panel in the base. This is a great desk item for an executive or an educational item to assist children understand Solar Power and simulate wind power. Its easy to assemble. Let the sun do the work !! Specification: Power：0.2W Rotate speed:0-500 turns/Min Item size：12.6x9.1x38cm N.W.:0.11kg G.W.:0.28kg