Kaz Safety light Warm Steam Vaporizer provides soothing, visible steam moisture for temporary relief of cough and congestion. It also provides proper humidity levels for up to 10 hours per filling to keep your respiratory system moist and helps relieve cold and flu symptoms. The vaporizer boils the water and produces a pure steam vapor that is released into the room. The vapor is bacteria-free and leaves no white dust. Quiet operating won’t’ disturb your sleep. Triple-wall insulation keeps reservoir water at a safe temperature.