Xergy Romantic warm white festival party wedding LED wine bottle lights copper wire LED string lights cork shaped Brightness atmosphere LED light, wireless and cordless Perfectly in any bottle, easy to use, just switch the button to turn on/off the light It can provide up to 24 hours of light by three batteries. Powered by: 3PCS LR44 batteries. The batteries can last for around 24 hours Package include: 4 cork light with batteries , (Bottle not included )