Solar Blue Fluttering Butterfly , Solar Powered or Battery Powered Swallowtail Butterfly Butterfly 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 butterfly dance in a wind, the slightest wind moves it very realistically. Realistic color.Butterfly size:2.75X2inches,pole tall when assembled:15.5inches.weight:4ounces. Easy to assemble and install.Energy saving.Durable plastic material. Water proof. Weatherproof.