Better Tech 700ML Aroma Atomizer Air Humidifier LED Ultrasonic Purifier Diffuser Coloful changing LED light lamp,independent light-control Large water 700ml capacity that can continue use up to 10-20 hours each time;Coloful changing LED lamp,romantic and convenient Aromatherapy: Enjoy the ultimate aromatherapy experience from this little sleek device using your favorite fragrance without any heating elements making this diffuser safe to use. The advanced ultrasonic technology used, produces vibrations at high frequency turning the water into mist creating a soothing and therapeutic atmosphere Humidifier: Moisturizes and refreshes the quality of air we breathe. This feature is important as it humidifies the hot and dry air in the room during summer and winter when heating is switched on Ionizer: Produces "happy feeling" negative ions which help to lift your mood, strengthen the immune system and relieve stress. Negative ions have several other benefits to the respiratory system and general well being