These submersible LED light strings look fabulous in your centerpiece vases, or in ponds, ice buckets, or anywhere you want to add a bit of sparkle! Totally waterproof. Price includes 2 x CR2032 batts, which are replaceable. They glow for around 1-2 days continuously before the batts run out. The strings have 20 LED lights along the 2m copper or silver wire.