NOTICEables Plug-In Warmer offers a fresh idea with an electric air freshener that alternates between two complementary scents, keeping your home noticeably fresh for 30 days. This convenient, inventive way permanently eliminates underlying odors, such as mustiness and pet smells while releasing waves of warm, subtle fragrance. The alternating oils keep your nose on its toes, ensuring noticeable freshness, all month long. Simply plug it and enjoy the air. To activate, insert refills (sold separately) and plug into your outlet.