【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 Wind Spinner】Powered By Solar, Two Tiers Blades In The Solar Wind Spinner. As Night Falls, It Flashes A Soft, Jewel-Like Light, Bright Metal and Rgb Changing Lighting Create Visual Enjoyment In The Garden. 【Wind Spinners Dimensions】70*16inches, There Are Multiple Connecting Rods Inside, Which Can Be Installed According to Your Favorite Height. It Can Be Easily Assembled Without Wiring and Without Any Installation tools. 【After-Sale Service】We Would Provide Good After-Sale Srevice.You Can Consult Us Whenever You Have Question.You Can Apply for A Refund If You Are Unsatisfied to The Prodction.