Solar Yellow Hummingbird, Dual (Solar / Battery) Power Fluttering Dance Hummingbird , Outdoor or Indoor, Solar Powered or Battery Powered Hummingbird flutters when place it in sun light( or bright light ) outside ( or inside ). Or placing 1 AAA battery in the hidden chamber under solar panels when the light is not bright. or just let hummingbird dance in a wind, the slightest wind moves it very realistically. Realistic color.hummingird size:4.5X5inches,pole tall when assembled:15.5inches.weight:5ounces. Easy to assemble and install.Energy saving.Durable foam, feather, plastic material. Water proof. Weatherproof.