Removes up to 99.9% of plaque from treated areas and is up to 50% more effective for improving gum health vs. string floss. This model comes with 7 flossing tips, 10 pressure settings, a convenient 1-minute timer with a 30-second pacer to ensure thorough water flossing of all areas, a water on/off button in the handle that allows for one handed operation, and a 3-year warranty. Waterpik® is the #1 recommended water flosser brand, clinically proven and accepted by the American Dental Association (ADA).