These Scent-Plug® Air Fresheners come in a range of colours, this one is bright yellow with a floral contempoary design. Plug these in and you can set the intensity of the fragrance for reliable 24/7 fragrancing. Combine with your favorite ScentPlug® refill (sold separately). Enjoy authentic true-to-life Yankee Candle® fragrance 24/7! Such a convenient way to have room filling, continuous home fragrance in multiple designs and locations. Use only with properly functioning 230-volt electrical outlets. Use only with Yankee Candle® electric home fragrance unit refills.