Light sensor:glowinthedark The LED fluorescent ice with built-in light sensor can illuminate in dark situation. Automatic:glowinthedark The LED fluorescent ice will automatically illuminate when it touch water or ice. Safe:glowinthedark The LED fluorescent ice is powered by the battery without any chemical reaction,safe and reliable to use. Beautiful light:glowinthedark There are different types of LED fluorescent ice with different light color,including colorful slow flashing,red color,white color,blue color and pink color. Scope of application:glowinthedark The LED fluorescent ice is widely used in bar,wedding,party and so on,to build romantic atmosphere. Note: Do not swallow, avoid placing in drinks that are too warm. As soon as you remove the ice from the liquid, dry the spot so that it stops shining and doesn't use electricity Color: As Shown Material: Acrylic Package Contents: 12x Waterproof Led Ice Cube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.