♥ENJOY DIY FUN: 3M 30 LEDs decorations are made of flexible copper materials, can be bent and shaped easily.The size of battery case is 2*0.87 inches, it's very easy to hide into your design works.Perfect for your Valentine's day gift decoration, home party, make cool jellyfish costume for your kids, or any other unique lighting projects you desire.♥SAFE HIGH-QUALITY & WATERPROOF:High Quality Low power & heat insulated copper wire make it not overheat after usage.It's a Waterproof String(Except the battery pack). The copper wire part can be put into water to achieve amazing atmosphere effects♥EASILY OPERATED : Each set of lights uses 2X CR2032 batteries( Included and can be replaced), it can last at least 48 hours. The battery box with ON/OFF switch, simply control the lights and enjoy them, Batteries need to be replaced when the lights get dim.