Battery Powered & Energy Saving: Each wine bottle string light is powered by 3 x LR44 batteries (batteries included), no plug needed and convenient to use. The silver wire is waterproof, but the battery pack is not. Continuous lighting can last for 12 hours, or can light for a specified time for 24 hours or more. Easy to Use & Install: Each cork has an on/off switch. Easy to turn on and off. Our bottle lights can be easily inserted into the top of the wine bottle. No need to drill a hole in the bottle. Just turn on the lights and enjoy these amazing bright fairy lights. A Novel Way to Recycle Bottles with Romance: 20 super bright LED bulbs on a 2m long and thin silver wire. Low heat emission and eco-friendly design. Fine beautiful bottle cork string lights can create a romantic, peaceful and warm atmosphere after decoration. Enjoy DIY Fun & For Many Occasions: Made of high-quality ultra-thin silver wire, better than normal copper wire, and these battery-operated wine bottle lights can be easily designed to any DIY shape you like. Suitable for parties, weddings, barbecues, Halloween, Christmas, squares, gardens, indoor and outdoor decoration, etc. It is also a good gift for your kids, friends and families. Please Note: Please remove the insulation film first before using. Use the screwdriver to open the battery case before changing to new batteries. Only the wire is waterproof, the cork is not, so keep it away from water. Wine bottle fairy lights are a creative idea for any decorative project, but do not use them as lighting.