... .led color optional LED promotional necklace , led necklace , flashing pendant , light up necklace , blinking necklace , promotion gift, blue led flashing necklace1. It ... , Heart, Martini Glass, Star, and Bottle Cap, 3. OEM/ODM LOGO and shape you welcome.4. LED lights color: Red, Yellow ... on/off switch There are 3 kinds of flashing mode. light up necklace