a).Material : Ceramics & Glass b).UL/SAA/CE/GS/ROHS ... develop immunity from disease for human. Those particulate can form a lot of negative ion around our computers and lessen harm ... fresh, lovely and humid air, let you feel like in a forest or beach.Decoration. Multifunction mist fountain with ingenious design ... KTV bar, hotel, restaurant, laboratory, hospital and so on. Ceramics Bear mist fountain