Maintain a clean, fresh smile with the cordless, easy-to-use EW1511W Ultrasonic Oral Irrigator. This water flosser uses ultrasonic technology with power of up to 1,600 pulses per minute to move water through the narrowed jet nozzle, and generate thousands of micro-bubbles that burst on contact to effectively remove food, plaque and bacteria from tooth surface, gums and periodontal pockets.