The light output from this necklace is just astonishing. Our image simply cannot capture the brightness of these LEDs. Six ultra-bright LEDs encased behind a clear cover shoot patterns of light across the white surface of this necklace, dazzling you with a brilliant reaction that you won't believe! One of our staff members wore the white necklace out and everyone in the club was pointing and those nearby practically had to shield their eyes as the light was so phenomenally bright! Comes in your choice of multi-color, white, or blue LEDs. Each necklace is about 2.5" diameter and comes on a lanyard necklace. Replaceable long-lasting button-cell batteries are included.