From the Manufacturer:
GuruNanda Tower™ (Rosegold) Diffuser for essential oils is an easy-to-use, high quality 100ml ultrasonic essential oil diffuser that utilizes ultrasonic waves to diffuse essential oils for up to 7 hours. The Nano-particles of the essential oil, together with water, form a calming mist that disperses into the air without heating or compromising the benefits of the oil. The beautiful color LED lights will create the perfect environment for you to experience the restorative and purifying benefits. Its sleek, modern design can easily complements any space in your home or office. Two essential oils are included.