Febreze 3Volution Air Freshener Plug In with Smart Programming continuously fights odours and alternates between 3 complementary scents for freshness you keep noticing. Lasts up to 90 days (if used 12h per day on low setting). Let a sense of calm envelop you as a clean & gentle scent fills the air. With traditional plugs, we get used to scents quickly and stop noticing them. Febreze 3Volution Smart Programming renews the freshness by continously & automatically alternating between 3 complementary scents every 45 minutes. Use Febreze 3Volution Electrical Diffuser with 3Volution refills to fill your home with freshness and fragrance that you will keep day after day, week after week. 3Volution also lets you adjust the level of scent, helping you to create the ambiance that you want, when you want.