This 7 color microlight has a unique light pattern that fuses colors with a dual-tone blend that fades from color to color through all 7 colors in a continuous ribbon. A sophisticated internal IC chip controls the amazing pattern change. For example, as you move it around, the light starts out with an all red streak, then you begin seeing bits of green in the streak. As green becomes more and more dominant, it creates a dual-tone dotted ribbon, until the streak becomes completely green. Bits of blue begin showing, until it becomes a dual-tone dotted green and blue streak, then the blue is blended in more and more replacing the green, so that the ribbon eventually turns completely blue; this cycle of each new color replacing the previous one repeats through all 7 colors. The cycle is quite rapid: each transition from one color fully into another is done in under 2 seconds. The effect is really incredible and definitely unique. Uses replaceable CR2016 batteries (included). Has both a squeeze-on and sliding on/off switch.