Simple to program and use, back-lit touch screen allows you to set the room to a desired humidity level from 30%-90%: Hygro+ will automatically monitor the humidity level by shutting off when the desired level has been reached. Set light to gently revolve through the colors, creating a calming, soothing effect to lull baby to sleep.With a full tank of water, hygro+ will run for optimal 22 hours to guarantee automated control from baby's bedtime to waking up and longer The whisper quiet cool mist helps to relieve cough, cold and flu symptoms, nasal congestion, dry cough, sinus irritation, nose bleeds, and dry skin