Ultrasonic Cool Mist Technology delivers a fine, even aroma without heat or chemicals 400 mL Capacity runs up to 15 hours for long-lasting fragrance and comfort 7 LED Color Modes provide customizable ambient lighting for any space Auto Shut-Off Safety ensures worry-free operation when water runs low Whisper-Quiet Design supports relaxation, meditation, and sleep Essential Oil Compatible (Essential Oils Not Included) for customizable scents