The NEW 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. 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, batteries (NiMh), wall plug, and USB cable. So take the Aroma-Express on the road, to your office, to your hotel, or on a cruise for aromatherapy everywhere. One year warranty.