Waterpik WP660 Water Flosser includes pulse-modulation technology for maximum plaque removal (Floss Mode) and enhanced gum stimulation for improved circulation (Hydro-Pulse Massage Mode). They 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, a convenient one-minute timer with 30-second pacer to ensure thorough water flossing of all areas, reservoir capacity of 90+ seconds, LED information panel and a water on/off button in the handle that allows for one handed operation. Removes plaque and debris from deep between teeth and below the gumline where brushing and traditional flossing can't reach, helping to prevent bad breath, gum disease, and tooth decay.