Light up your party and light up your guests for a disco theme party withour Disco theme light up necklace. Each Disco round pendant is 1 1/4" in diameter and comes on a 24" cord. All pendants have a multi functional switch, slow blink, fast blink or constant on and come with batteries included and installed and white L.E.D's. Our Disco theme light up pendant is sold by the piece. Please order in increments of 1 piece.