Your choice between two styles of round, white diffusers, a wood grain style diffuser, or a white, oval shaped diffuser. All four styles are electric and have light up options that display multiple colors if chosen. You also have the option to run the diffuser without the lights on. Simply fill the diffuser with water. Put a few drops of your favorite Jenny Grace Organics Essential Oil, Fragrance Oil or Essential Oil Blend in the diffuser, turn it on and enjoy the awesome benefits! The Large round 450ml is larger than the others, holds twice as much water, lasts longer and is $10 more. It also has multiple settings.