Why have a one-color pendant when you can have a whole rainbow? This 2" crystal pendant has a super-fast cycle between the colors that creates a rainbow of colors when the pendant swings back and forth on the black necklace cord. Our animated image is slowed down as the actual rapid strobe cycle is too fast for our camera to capture. (Pendant flickers a pinkish purple when still.) Easy twist-on/twist-off operation. Three AG3 Batteries included and are replaceable.