The Black Chicken Remedies Skypipe™ Ceramic Ultrasonic Essential Oil Diffuser disperses essential oils into the air through ultrasonic diffusion. The ultrasonic system creates a cool mist without heating the essential oils, preserving their natural properties. Offers 3-7 hours of cool mist diffusion that's gentle on your eyes and sinuses. This BPA free diffuser has an empty/low water level sound indicator, auto OFF when empty and covers room sizes 30-40 square metres. Includes measuring cup, instructions and detachable power adaptor with Australian plug.