What makes it different? - High-quality copper wires, flexible and bendable, the string light has high brightness, low radiation and no pollution. - The Lovely LED Lights is very Low Heat Generating, besides Saving Light Power. - The LED string lights are connected in parallel, so if one bulb broke or burnt, others won't be affected. - Perfect for Positioning Lights to any Decorative or Holiday Project, Suitable for Party, Square, Garden, Indoor Decoration, Outdoor Decoration,etc. How to Use the Wine Bottle Lights with Cork? Step 1: Please pull up the insulating strip after unpack and check the light; Step 2: Please turn on the switch above the cork "ON/OFF"; (If the product did not light up, please replace battery) Step 3: Please turn off the led string light if don't use it and insert the insulating strip to save battery life. Universal Size Make full use of different empty bottles and turn them into nice masterpieces for your home decor.The cork size is 0.6-0.9in, no need to drill a hole in the bottle. Safe to Touch These LED bottle lights are stable operated by safet voltage. No need to worry about your kids or pets touch it. Waterproof The silver wire of the light is IP65 waterproof, you can put the light string into the bottle with liquids for a special glow. The cork part is not waterproof, please keep it dry. Specification Material: Copper String and Plastic Cork Color: Cool White Type of Bulb: LED String length: 2M/6.5ft per light Total LED bulbs：20 LEDs *12 Bottle Lights Powered by：LR44 battery *3PCS Package includes 12 Pcs X Wine bottle cork lights(batteries already Installed) 9 Pcs X hight-quality replacement batteries NOTE: Only the copper wire parts are waterproof, the cork part is NOT waterproof. Remember to take away the plastic tab under the slide switch