The Splash Strobe Ball Ring is a great, inexpensive way to have a light show ready anytime you wanna dance! The plastic ball contains bright red, green, and blue LEDs that strobe rapidly, creating a multicolor streak of light as you move around. A button under the ball turns the light on and off. One size fits most fingers. The ball is approx. 1 1/4" diameter. Includes installed non-replaceable long-lasting CR1616 batteries.