Air freshener features a self-adhesive holder for secure placement on any flat surface & doesn't need to be replaced once it's installed. Powerful design contains 50 times more fragrance than standard toilet rimsticks to provide complete freshness for 30 days. Convenient reminder system lets you know when to replace the air freshener to ensure efficient performance. Air freshener is perfect for use in restrooms, lobbies, conference rooms, nursing stations, offices, kitchens & more.