... 0The advantages of our Aroma Diffusers:1. Exquisite shape.2. Ultrasonic technology, no heating, safe and high efficiency.3. Work quietly ... the latest advanced technology, the brand new aroma diffuser uses ultrasonic technology, different from traditional diffuser, it does not need to heat up ... 2. It works much more efficient and steady, driven by ultrasonic waves at a frequency of 1, 600, 000 times per ...