Unstoppables Plug-Ins fill the air with unstoppable freshness thanks to their highly concentrated perfume. The Dreams scent has notes of milk and honey. Unstoppables Plug-Ins feature 3 scents that alternate every 45 minutes, so you keep noticing them. They're also available in Spring scent which will add a luxurious touch of rejuvenating sun-kissed glory to your home. Unstoppables Plug-Ins last up to 90 days if used 12 hours per day at a minimum setting.