Equipped with a large 6L water tank, the top fill humidifiers for bedroom can be used in rooms of up to 538 ft2 and run for up to 50 hours on the lowest mist setting. When running low on water, the cool mist humidifier will automatically stop misting and a red light indicator will let you know it is time to refill the tank.  At up to 300ml/h, the ultra-fine cold mist can quickly hydrate the dry air and help alleviate congestion, coughs, and dry skin. Rotate the 360° nozzle to target a specific location for quicker results. Suitable for indoor use in bedrooms, large rooms, nurseries, and offices.