The practical Aroma Car Diffuser (7086) is the perfect car air freshener to surround yourself with mood-enhancing natural fragrances whenever you’re on the road. Simply apply a few drops (2 to 5) of essential oil on the reusable pads and insert into the aromatherapy diffuser. Plug the diffuser into the car lighter socket and enjoy the benefits of your chosen pure essential oil. Unplug the diffuser if the light remains lit after turning off the engine to avoid draining the car battery. A refill pad can be used until it hardens and/or discolours. It comes with five refill pads.