Wolaid WD01 Steam Inhaler is very effective for relieving the inflammation and congestion of your sinuses, relieving the symptoms of dry mucous membrane and keeping your nasal passage moist and clean. This is the convenient way to give fast and natural relief to people suffering from cold, congestions, laryngitis or allergies. It provides the right amount of humidity where it is required in the upper respiratory area. When you inhale the steam, it also relaxes the muscles and relieves coughing to an extend. It moisten dry nasal passges and loosen thick mucous, so that the congestion gets cleared more easily. Contents: 1 steam inhaler, 1 instruction manual