SumDirect 12/30/50/100 Pack LED Party Lights Non-Blinking Waterproof Lights For Paper Lanterns Balloons Floral or Wedding Decorations (100, Blue) Non-blinking waterproof lights Powered by three replaceable 1.5V LR41 button cells(last for 4 - 6 hours or longer depending on temperature and humidity) Size:0.5" diameter x 1.25" length Perfect for decoration of parties, weddings, birthdays, hotels, anniversaries, restaurants, christmas, halloween, lounge, bars and so on Turn LED on and off by twisting the base. <span class="a-text-italic">Battery: </span>Powered by three replaceable 1.5V LR41 button cells(last for 4 - 6 hours or longer depending on temperature and humidity) <span class="a-text-italic">Usage: </span>Perfect for decoration of parties, weddings, birthdays, hotels, anniversaries, restaurants, Christmas, Halloween, lounge, bars and so on. Not only used as decorations, but for many other uses such as lighting up what you want. They are bright enough to use inside a vase or balloons Can also be used inside balloons or paper lanterns. <span class="a-text-italic">Easy to turn on and off :</span>Easy to turn LED on and off by twisting the base.They do have a little hole so you can string them and that made everything much easier. <span class="a-text-italic">Material: </span>The non-blinking waterproof lights are made of electroplating material and waterproofmaterial <span class="a-text-italic">Quantity include</span>100 <span class="a-text-italic">Color:</span>Blue