RioRand 100ml Aromatherapy Essential Oil Purifier Diffuser Air Humidifier with 4 Timer Settings & 6 Colors Changing Light Powered by RioRand Advanced Technology Enjoy the ultimate aromatherapy experience from this little sleek device using your favorite fragrance without any heating elements making this diffuser safe to use. Produces "happy feeling" negative ions which help to lift your mood, strengthen the immune system and relieve stress. Moisturizes and refreshes the quality of air we breathe. Humidifies the hot and dry air in the room during summer and winter when heating is switched on. Whisper-quiet ultrasonic operation, monitor the shortage of water automatically and ensure the safety. 7 Timer settings: 180 minutes, 120 minutes, 60 minutes and 30 minutes. 6 soothing color lights to choose.