Self-Contained! Approximately 6" wide and 36" long. It is a wonderful effect that could be described as automatic. Show a black scarf and shake it. It changes into a wonderful rainbow color. Or do it the other way...start with a rainbow color scarf and shake it...it turns black. Written instruction shipped with product.
Please note: This listing is for just the Color Changing Streamer. Video is for demonstration purposes only. Vanishing Cane is not required to use Color Changing Streamer.