This toilet bowl deodorizer is a unique toilet rim hanger containing organic deodorizing compounds that are muchstronger than traditional rim hangers. Specially designed to fit any toilet bowl. VOC compliant in all 50 states. Requires no batteries or electricity to operate. Keeps area fresh smelling and deodorized for 30-45 days.Note: this product is designed to be installed with the body of the rim hanger on the outside of the toilet. Packed 12 per case. Lime Twist fragrance.