The Aroma-Express™, is a handy mug-sized atomizing diffuser. Cold-air diffusion disperses the essential oils into the air on a molecular level, allowing the molecules to be bio-available. Oils are not damaged by HEAT or WATER with the Aroma-Express. Portability is a breeze with rechargeable batteries and a USB cable. Multiple digital timer options put you in control of the oil and aroma output. Included is an AC power adapter, four AA batteries (NiMh), wall plug, and USB cable. So take the Aroma Express diffuser on the road, to your office, to your hotel, or on a cruise for aromatherapy everywhere.