Effectively remove up to 95% of free chlorine and other chlorine types from shower water * Negative ions reduce water cluster size to improves filtration as well as helps PH balance the water * Attaches conveniently inline between shower pipe and any existing showerhead or handle * Filter replacement indicator: Twist dial to appropriate month for a visible reminder * Filter included ($25 value): Reversible filter should be replaced every 4-5 months (5000 gallons)