LED "Neon Look" Red Heart Light Necklace is a lovely treat for a night out on Valentine's Day. Perfect at the club, house party, festival, you name it! Light Up Heart Necklaces let love light the way. To activate LED "Neon Look" Necklace, press button on back of pendant for 3 light modes: flash, blink and still lighting. Breakaway clasp makes this necklace safe for all. LED "Neon Look" Red Heart Light Necklace comes ready to use with 2 CR1220 Batteries; not replaceable but long lasting.