be spoilt for choice with 15 individual colors, or turn to color changing mode to match the mood in bars or at live concerts Powered by batteries ; can be reused by replacing the batteries, making it more environmentally friendly than most glow sticks Adopts a LED which can emit 15 different shades of brilliant light. Visible range of over 500 m on a clear night.Made of PP and ABS material, no smell, safe to use, widely used at vocal concerts, evening party, celebration, opening ceremony, wedding, to create atmosphere.