Mini LED Lights - Measures 1 cm in diameter and 3.7 cm in length. Perfect for illuminating paper lanterns for weddings, DIY crafts, floral arrangements, garlands, bouquets, bridal sets, table decorations, vases, balloons. Unique Design - Tighten to turn on the light and loosen to turn off. With a hook at the bottom, you can easily thread and hang them, or use a wire for string lights. Light Color: Soft Warm White IP64 Waterproof - Made of silver-plated ABS, it can be fully submerged in water without damaging its function. You can use these lights in nature for outdoor camping, barbecues, art projects, etc. Batteries Included - Comes with 3 x 1.5V LR41 batteries in each LED, ensuring use right out of the box. Estimated lifespan of over 100 hours with a new battery. Note: Optimal brightness for 4 hours. Widely Used: Comes with 24 LED lights with batteries. Perfect for decorating parties, weddings, birthdays, carnivals, Christmas, Halloween, garden, living room, restaurants, hotels, bars, and so on. Details: Quantity: 24 pieces. Color: Warm White. Waterproof: Yes. Size: 1 x 3.7 cm. Burn Time: Strong light for 4 hours. Power Supply: 3 x LR41 batteries (included). How to turn on the lights: A. Twist the cap of the LED lights. B. Remove the film from each LED light. C. Twist the cap until you see the balloon light up. Reminder: If you want to turn off the lights, twist the cap and insert the film into the cap, then twist the shell. If some lights do not light up by simply twisting the base, it may not be a quality problem; twist with more force; if the lights still do not work, disassemble and install them and then try to twist them.