Solar and Battery Powered Hummingbirds of Assorted Colors, 3D size: 4"(wing to wing) x4" (head to tail) x3 (height)". The small solar panel converts the daylight into energy for the butterfly and the stronger the sun the more active it moves. It is waterproof and designed for outdoor use in flowerbeds, and walkways, pots and patio No need of a AAA dry cell battery unless you'd like to use indoor. Battery is not included.