I bought this once for an event, but I haven't used it since, so I'm selling it. Operation confirmed. This is a high-performance penlight that can change colors to 18 different colors with just one light. With this wide variety of colors, you can match the colors of the entire venue, creating a sense of unity and making everything look beautiful. With this one penlight, you're sure to enhance the excitement of a live performance. You can also keep one color constantly lit, so if you decide on a color with others, you can create a unique performance at birthday events or wedding after-parties. Uses two AAA batteries. Available for immediate purchase.