<br>Cute as a button, this fun, vibrant ultrasonic diffuser is designed with baby in mind. The Koala Ultrasonic Diffuser from Oil Garden doubles as a nightlight and is whisper quiet, making it ideal for use in the bedroom or playroom. The Koala Ultrasonic Diffuser uses ultrasonic technology, allowing you to experience Oil Garden Pure Essential Oils in their purest form, making it safe for you and your family.