Add color and action to your city scenes with these unique kits. Perfect for detailing business buildings, the various sizes can be used to model smaller exterior or window-mounted signs in S, O, or G Scales. (PLEASE NOTE: these kits are NOT for outdoor use.) Each is made of special plastic that is just .008" thick for a near-scale appearance. The sign is coated on one side with phosphor, which glows when current is applied. This produces a soft, neon-like light that is bright enough to be seen under regular room lights, but generates almost no heat. Each kit comes with an assembled 3 volt power supply which requires two AAA batteries, not included. Complete instructions cover all of the steps needed for installation and operation. Left and right versions may be mounted together to create a sign that lights on both sides.