Features100% Brand new and high qualityLED lights for happy gathering partyEasy operation and beautiful decorationPerfect LED light decoration for parties and add pleasure atmosphereSize: 1.8*3.3*1.8cmBattery: Powered by 3pcs AG3 button cell batteries， (battery included and replaceable)OperationUsage method: Tightening thread， it will bright; Loosening thread， it will turn offIts function includes always bright 2-3 hours. Burn time up to 8 hours.Fit for anniversary celebration， party， concert， wedding， birthday， carnival， Christmas day， HalloweenPackage include50x LED balloons lights (include batteries)