SoulBay Led Balloons Lights, Mini Battery Operated Waterproof Lights for Paper Lanterns Balloons - 24PCS Warm White These mini led lights with warm white color. Measures 1/2-inch diameter by 1-1/4-inch length. Easy to install. Usage method: Tightening thread, it will bright; Loosening thread, it will turn off. With waterproof feature, these mini battery-powered led lights can be use for paper lantern and balloon; disposable party lights with a built-in loop for hanging. More than 10 hours work time, which for centerpieces, place settings, candle votives, paper lanterns, balloons and more. Battery Powered by 3 pcs LR41 button cell batteries. Attention: The only retailer on Amazon is SoulBay. [ Tip: We add a paper film to PROTECT the battery, PLEASE remove it before using.]