Ambi Pur 3Volution Air Freshener Electrical Plug In Refill with Odourclear technology continuously cleans away tough lingering odours, leaving a light fresh scent for up to 90 days (if used 12 hours a day at minimum setting). Cotton Fresh fragrance is inspired by the freshness of pure white cotton. Let a sense of calm envelop you as this clean & gentle scent fills the air. With normal plugs we get used to scents quickly, which means we eventually stop noticing the scent around us. Ambi Pur 3Volution air fresheners solve this problem by continuously & automatically alternating every 45 minutes between 3 complementary, high quality scents, for a continuous fresh experience. Use the Ambi Pur 3Volution refills only with Ambi Pur 3Volution devices, sold separately, to fill your home with air freshness and fragrance that you will keep noticing day after day, week after week. And for instant freshness, try the full range of new Ambi Pur products with the unique Odourclear technology, such as Ambi Pur Fabric Refresher, Air and Car Freshener.