This item is used with the Life Science Car Diffuser. Use this Japan/Taiwan/US/Canada/China two legged AC Adapter (110-240V) to turn your Life Science Car Diffuser into a home diffuser by plugging it into an outlet.
Life Science Car Diffuser: 
https://discoverls.com/products/life-science-car-diffuser
https://discoverls.com/products/car-diffuser-white-purple
*Note: This AC adapter does NOT work with the new Aromatic Car Diffuser - White and Gold Edition.