Clinically proven up to 50% more effective than traditional dental floss and up to 80% more effective than Sonicare® Air Floss (Model HX8181) for improving gum health. Proven in laboratory tests to remove up to 99.9% of plaque from treated areas with a 3-second application. Clinically proven up to 3X as effective as dental floss for cleaning around braces with the Orthodontic Tip. Removes bacteria deep between teeth and below gumline where brushing and traditional flossing can't reach. Massages and stimulates gums to improve circulation and keep your gums strong and healthy. Great for people with implants, crowns, bridges, and veneers. Leaves your mouth feeling incredibly fresh and clean. Product Features Dual pressure control system with low for sensitive gums, high for deep cleaning Advanced ergonomic design with non-slip grip Reservoir can be filled without removal Convenient, recharging power supply No batteries needed Easy to store when not in use Tips rotate 360 degrees to reach all areas of the mouth Reservoir capacity is 210 mL (7 oz) Pressure range is 45 to 75 psi