You can easily adjust the fragrance level of the diffuser, depending on whether you like it strong or mellow The Hawaiian Sunrise fragrance by Refresh is a subtle tropical charm The fragrance has a nice vanilla base that lingers, after the top notes of ripe banana and coconut have worn off The middle notes of tropical fruits accentuate the tropical flavor of the scent Simply attach the mini diffuser to the AC vent of your car, adjust the fragrance levels, and you are on your way to making your car smell nice