Product Description 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. No glue required. 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 The unit is 11 inches tall, and the blades are 9 inches wide. Needs light for the unit to turn. No batteries installed. Great gift item, or fun to play with.