Just place it in your bird bath and it will operate unattended until you remove it. Features an action that creates continuous ripples in water, preventing mosquitoes from laying eggs in birdbaths and attracting birds. Helps prevent the spread of West Nile Virus by eliminating stagnant water in bird baths. Easy to install. Just place and go! There is no wiring and no plumbing. It operates on two D-cell batteries (not included).