Pack of 12 units: 12 pack LED Fairy String lights are mainly made of high quality 3.3ft long flexible silver coated copper wires, with 20 Micro LED Beads. Please note, 2 x CR2032 batteries per lights and a screwdriver included, 72 Hours of battery life. Batteries need to be replaced when the lights get dim. | DIY Lighting Decoration: With flexible and extra thin but sturdily built silver wires, the led string fairy lights can be easily bend, twist and mould into any shapes that you desire. Perfect to decorate wedding, party, Christmas, jars, vases, wine bottles, planting, Christmas trees and other craft. | Safe & Save Energy: 2x CR2032 batteries per string included, which support 72 hours continuous working and longer if using with breaks. The Starry Moon Lights are extremely low power and insulates heat. They are safe to touch. The soft lights can also protect your eyes. | IP67 Waterproof: The string with LEDs is IP67 waterproof rating and it could be immersed into water, ideal for indoor and outdoor use. The battery box is not waterproof, please place it properly. | What You Get: 12 set of LED Fairy String Light, 2x CR2032 batteries per lights, 1x User Manual, 1x Screw Driver for replacing batteries.