The TotalComfort Cool Mist Ultrasonic diffuser provides soothing, whisper-quiet humidification to improve air quality and comfort in any room. With adjustable mist settings and a sleek design, it helps relieve dryness while blending seamlessly into your home. It features a 360-degree mist nozzle that disperses mist in rooms up to 400 square feet and a 0.97-gallon water tank with top-fill design. Essential oils are not included.