Unstoppables Plug Ins fill the air with unstoppable freshness thanks to their highly concentrated perfume. The Spring scent adds a luxurious touch of rejuvenating sun-kissed glory to your home with its floral character that rests on woody and amber bottom notes. Unstoppables Plug Ins feature 3 scents that alternate every 45 minutes, so you keep noticing them. They're also available in Fresh scent which is inspired by the ocean spray, invigorated with zesty green citrus fruits and rich creamy bottom notes. Unstoppables Plug Ins last up to 90 days, if used 12 hours per day at minimum setting.