Fresh Products Easy Fresh 2.0 Room Air Freshener Cover/Refill - Ocean Mist (2 Refills) Fresh Products EASY FRESH: Consistent Freshness for 30 days Because the cover is the air freshener, Easy Fresh has the most exposed surface area of any refill resulting in maximum fragrance release. Easy Fresh is programmed so that as the 30 days pass and the fragrance evaporates, the fan spins more frequently keeping the room smelling just right Every 30 days Easy Fresh provides a visual and audible indication that its time to replace the refill. Every refill comes with a new battery, so you change them both at the same time and never run out. Room Air Freshener Cover Refill - Ocean Mist