Product Description Our Raver Light Beam Rings are great for parties, raves, clubs and all kinds of night time fun plus batteries are included! Batteries last 30 continuous hours. Just slip a ring on your finger, start moving, and it starts illuminating a beam of light. Extreme light up rings ship in assorted colors. Comes with on/off switch to eliminate waste of battery life. Also good for keeping in your car or home when you electricty goes out and need a miniature flashlights.