Brondell RO Circle Water Saving Reverse Osmosis Water Filter System, WQA Gold Seal Certified WATER SAVING SMART TECHNOLOGY - up to 10 times more efficient than conventional RO systems DESIGNER CHROME FAUCET with integrated LED filter change indicator (included) SPACE SAVING COMPACT DESIGN leaves plenty of room for under sink storage QUICK CHANGE TWIST AND SEAL FILTERS, non-electric design (no pumps or electricity required) WQA GOLD SEAL CERTIFIED four-stage reverse osmosis filtration for NSF/ANSI Stds 42, 53, 58, and 372