This Febreze 3Volution Air Freshener Kit 20ml continuously removes odours and alternates between three complementary scents for noticeable freshness. It lasts up to 90 days (if used 12h per day at a low setting). With digitally controlled scent alternation - fresh scent travels further to fill your room with fragrance. The Spring Awakening Scent is a light green fragrance inspired by the spring-time natural freshness of Lenor. 3Volution alternates the complementary scents every 45 minutes to fill your home with freshness and fragrance that you will keep day after day, week after week. It also lets you adjust the level of scent, helping you to create the ambience that you want when you want.