【Solar Powered】Powered By Solar Energy, Each Windmill In The Yard Is Equipped With Rechargeable Ni-Mh Batteries, They Will Charge for 6-8 Hours During The Day and Work for 8-10 Hours When Night Falls. Convert Sunlight to Electricity Saves Energy. 【Durably-Built for Outdoors】Our Windmills for The Yard Garden Have A Solid Metal Construction With Sealed Bearings to Prevent Water From Seeping Into The Moving Parts and Cause Unwanted Water Damages. 【Solar Windmill Light】Powered Led Lighting- Installing Our Metal Pinwheels for Yard and Garden Complements The Overall Lively and Relaxing Ambience You'Re Trying to Achieve, and Will Perfectly Harmonize With Your Existing Lawn Ornaments. 【Windmill For Yard】The Big Windmill And 4 Small Windmills Rotate Together 【Instructions Of Wind Spinner】The Instruction Sheet Is Included In The Package, Pls Kindly Ready It Carefully If You Have Any Questions About Its Usage Or Directly Contact Us.