A LED indicator light on the unit lets you know when it’s time to change the filter, ensuring your water is always clean and fresh tasting;Includes one (1) Single-Stage Advanced Water Replacement Filter with a capacity of 845 gallons or approximately one year in a typical at-home usage situation;The system requires a Single-Stage Advanced Water Replacement Filter (845-gallon capacity) or a Single-Stage Standard Water Filter Replacement (500-gallon capacity);Compatible with SIP beverage faucets, with adapter kit 262578;Improves drinking water's taste, smell, color, and clarity by removing contaminants like lead, mercury, asbestos, pesticides and VOCs