1.It has 21 kinds of working state, can change color automatically at the same working state; 2.Little power consume, long servicelife(above 100,000 hours); 3.No danger of electric shock, many styles; 4.Widely used in swimming pool,public square fountain and other facilities for beautifying city. 5.Technical parameter: Standard input voltage: AC12V Standard input watt: Max: 4.5w Min: 1.2w Life-span: > 100,000 hours