Also works with Unstopables. Alternates for lasting freshness. Febreze NOTICEables has two alternating scent chambers that deliver long lasting freshness. Scent 1. Scent 2. UL listed. Questions? 1-800-699-4657. www.febreze.com. www.pg.com. Good Housekeeping: Since 1909. Limited warranty to consumers. Replacement or refund if defective. Warmer made in China.