Battery operated and more energy saving: Each wine cork light chain is powered by 3 x LR44 batteries (batteries included) and does not need to be connected to the mains and is convenient to use. The silver wire is waterproof and the battery is not waterproof. Continuous lighting can last for 12 hours if it can only light up for a certain time for 24 hours or more. Easy to use and 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. You don't need to drill a hole in the bottle. Just turn on the lights and enjoy these amazing bright fairy lights. A new way to recycle bottles with romance: 20 super bright LED lights on a 2 m long and thin silver wire. The low heat emission and environmentally friendly design. Nice beautiful bottle cork string lights can create a romantic, peaceful and warm atmosphere after decoration. Enjoy DIY fun and for many occasions: Made of high quality thin silver wire better than ordinary copper wire and these battery operated wine bottle lights can be easily used for any DIY shape you want. Suitable for parties, weddings, barbecues, Halloween, Christmas, squares, garden, indoor and outdoor decoration, etc. It is also a great gift for your children, friends and families. Note: Remove the insulation film first before use. Use the screwdriver to open the battery compartment 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 lights.