The Febreze Ambi Pur 3Volution Refill with Odour Clear technology continuously cleans away tough, lingering odours around the home. Once inserted into your 3Volution device and plugged in, the 3 scents alternate every 45 minutes so you always notice the pleasant smells. All the while, it kills any bad odours instead of masking them for a fresh home. Each refill lasts up to 90 days so you don't have to worry about lingering unpleasant odours. This pack contains 6 x 20ml refills in the Sparkling Bloom fragrance, with each refill lasting up to 90 days if used for 12 hours per day at the minimum.