... ,000 hours.4.No need the ON/OFF button,it will work just connect the Electric power.5 ... brands of humidifier are ejected, help mist, exhaust hole in the water level.).Two, the water: ordinary tap ... the quality is hard to produce scale, every week with the "scale removal agent" and a soft brush ( ... actual service life is influenced by water quality. Yellow Lighting LED Bubble Column For Party Decoration