Wear flip flops all year long with the Blue Flip-Flop Acrylic LED Necklace! Light up the dance floor on a hot summer night, hand out to your friends while mixing cocktails together, great as giveaways for guests on a cruise ship, there is just no party time this fun LED Jewelry can't handle. TGIF - you're on permanent vacation with Blue Flip-Flop Acrylic LED Necklaces! To activate your Light Up Flip Flop Necklace, plug in the magnetic end & push. To turn off, flip the magnetic end around & plug in the opposite side. When turned off, plastic sandal is crystal clear. Sold in packs of 25. Non-replaceable batteries are included.