New formula. From the makers of Lysol brand products. Cleans for up to 8 weeks (Each unit lasts up to 4 weeks). Antimicrobial protection in the hook to resist odor-causing bacteria. Cleans. Fragrances. Lasts up to 8 weeks (Each unit lasts up to 4 weeks). Questions? 1-800-228-4722. For ingredient and other information, www.rbnainfo.com. Made in Hungary.