safety voltage operate,even the light diving in water,no danger to people,no worry about outdoor rainy day. Controller with memory function, remember the setting last time you before you turn off. Safety voltage operate make the LED more stable and less heat emission, enable longer life span and Eco-friendly. 8 lighting model,freely change the model according to your mood and atmosphere. Excellent Decoration Effect for Christmas, Party, Wedding, Celebration, and all other kinds of Decoration Lighting.