Releases more than twice the active ingredients as look-alike screens, over 30 days to keep the urinal and restroom smelling fresh. Doesn't just mask, it releases optimized bacteria that consume odors. Features a post and lattice design extending through the screen and diffuses the urine stream while releasing a pleasant fragrance. The 2-sided anti-splash design removes 99% of urine splash either side up! 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.