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.