Make sure diffuser is unplugged. Place diffuser on an even, flat surface. Slowly add water and a few drops of essential oil. Take care not to spill. Enjoy your aromatherapy at one of the following locations - Home: Plug in any USB port around your home to fill a room with your favorite scents. Office: Plug in any USB port around your office for aromatherapy while you work. Travel: Plug into the USB port in the airport or your hotel room for easy on-the-go aromatherapy. Instruction manual enclosed.