20x Balloons Lights, Display types: steady light, Cool/Warm White/Colorful Batteries- 3 x 1.5 V LR41 batteries in each LED, Each light will last from 2-48 hours, light up to 48 hours, 2 hours is the optimal brightness. (batteries are included). Reusable, economical and environmentally friendly. Waterproof with high quality material - These led balloons light are made of silver-plated ABS and it can be fully submerged in the water without damaging its function. Easy Operation - With on/off switch, just turn LED on by twisting the base before putting them into the balloons, paper lanterns, vases, bottles or any centerpieces you would like. Suit Various Occasions - With a hook at bottom, you can thread and hang them easily to fit paper lanterns, balloons or parties, wedding, birthday, carnival, Christmas, Halloween.