1.Product name: flashing ring 2.color and shape customered 3.Wrest it,it will light up 4.built in 2 pcs batteries LED promotional necklace , led necklace , flashing pendant , light up necklace , blinking necklace , promotion gift, blue led flashing necklace1. It can be used as the promotion gifts , as well as , good decoration at a club, party, dancing,.2. Different shapes are available: Square, ...