This patented urinal screen releases more than twice the active ingredients as look-alike screens over 30 days to keep the urinal and restroom smelling fresh. the wave doesn’t' just mask, it releases optimized bacteria that consume odors. the revolutionary design features long protrusions on the top that diffuse the urine stream while releasing a pleasant fragrance, cutting cleaning time in half. the wave 2.0 easy reminder system lets you know when it's time to replace the screen. simply remove the tabs upon installation to set your replacement date.