This environmentally friendly air freshener cover is perfect for both, public and private bathrooms. Unlike normal air fresheners which require liquid fragrance and refills, the P-Wave Easy Fresh Cover IS the air freshener. Simply attach the cover to the accompanying fan (sold separately) and let it freshen air for up to 30 days, then a month later simply replace the cover - no refills or constant monitoring needed! The P-Wave Easy Fresh Cover continuously freshens and disperses in air for up to 30 days, meaning no spritzing showers or uneven fragrance distribution. Also, the P-Wave Easy Fresh Cover is 100% recyclable and requires 50% less energy to produce than other conventional metal/plastic dispensers, so you can rest easy knowing it's environmentally friendly.