PORTABLE CONVENIENCE: Cordless Waterpik Water Flosser is designed for travel anywhere, use in the shower, and small bathroomsCLINICALLY PROVEN: Removes up to 99.9% of plaque from treated areas and is up to 50% more effective than string floss for improving gum health - accepted by the American Dental Association (ADA)1 MINUTE PER DAY: Use 1 minute a day for a cleaner, fresher, healthier mouthNO OUTLETS, NO CHARGING: Includes 3 AA batteries (no outlets or charging needed) - assuming daily use, replace batteries every 1 to 2 months, depending on quality of batteriesFEATURES: 2 pressure settings ranging from 45 to 75 PSI, 1200 pulses per minute, 5-ounce water reservoir for 30 seconds of flossing time, 2 flossing tips, 3 AA batteries; flow rate per minute : 8 ounces ( 237 ml)