Freshens for 30 days: Releases billions of optimized bacteria and more than twice the fragrance as competing urinal screens over 30 days to keep the urinal and restroom smelling fresh. Installs correctly every time: Unique design eliminates installation error and installs both ways without sacrificing splash reducing performance. Reduces splash and cleaning time: Long posts on both sides plus a unique hexagon lattice eliminate urine splash, cutting cleaning time. Reminds you when to change it: Simply pull off the week and month tabs to set your reminder.