Neon4Less Neon Signs feature multi-colored, hand blown neon tubing. The glass tubes are supported by a black finished metal grid, which can be hung against a wall or window; they can even sit on a shelf. Neon4Less neon signs have a warm mesmerizing glow, and are powered by industrial strength transformers, which operate silently and more efficiently than incandescent bulbs. All you do is hang it up and plug it in - no assembly or special wiring required. Measures 24 inches x 15 inches x 4 inch(es).FOR INDOOR USE ONLY.