Febreze Unstoppables Air Freshener Plug Ins fill the air with unstoppable freshness thanks to their highly concentrated perfume. The Fresh scent is inspired by the ocean spray, invigorated with zesty green citrus fruits and has creamy sweet bottom notes. Unstoppables Plug Ins feature 3 scents that alternate every 45 minutes, so you keep noticing them. They're available in 4 another scents and last up to 90 days, if used 12 hours per day at minimum setting.