Enrich your home with the refreshing aroma of Air Wick air freshener electrical plug in refills. Designed for use with all Air Wick plug in devices, this refill releases its scent continuously and can be adjusted according to your needs - keep a low setting for subtle fragrancing or small rooms; or turn up the intensity and fill even the largest of rooms with enticing and elegant aromas. This refill contains natural essential oils and each refill lasts for up to 100 days on a minimum setting. Simply keep the refill upright and insert into the diffuser until you hear a click. Air Wick Plug-In Device consumes less than 2p of electricity per day. Based on 24 hour/day usage.