AngelTech Desktop Model-Solar Powered Windmills/Wind Turbine&ABS Plastics Education Toy This solar windmill is a DIY product, which use weak light type of amorphous silicon solar cell as power, it can rotate with sunlight. educational item to assist children understands the change between Solar Power and wind power It is a desk model, Its a great gift for your child, for your friend, for your client Easy assemble. No glue required, No battery required Material: ABS engineering plastics