Allied Precision, Inc.'s Aurora Lighted Water Wiggler features a gradually changing rainbow of colors that casts a soft glow at night. The light turns on automatically at dusk, glows for three hours, and then shuts off automatically. Just like the original Water Wiggler, the Aurora keeps mosquitoes and other insects out of your birdbath by keeping the the water continuously rippling year-round, even in a heated birdbath during winter. The unique agitator action not only keeps mosquitoes from laying eggs in your birdbath, it also helps prevent the spread of West Nile virus by eliminating stagnant water. The beautiful, colorful rainbow glow gives your birdbath a strikingly lovely appearance at night. The Water Wiggler installs easily with no wiring or plumbing involved. Just insert 2 D batteries (sold separately) and place the Water Wiggler in your birdbath. Run it 24 hours a day for up to 2 months without replacing the batteries! The Aurora Lighted Water Wiggler comes with a 6-month warranty.