Ambi Pur 3Volution Air Freshener Electrical Plug-In Diffuser 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). 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 device only with Ambi Pur 3Volution refills, sold separately, to fill your home with air freshness and fragrance that you will keep noticing day after day, week after week. The adjustable diffuser also lets you decide on the intensity of the scent, helping you to create the ambiance that you want for up to 90 days 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.