Lightweight, cordless and easy to use, the Waterpik Cordless Select Water Flosser makes it easy to maintain healthier gums. It is a great solution for those who prefer the convenience of a cordless electric Water Flosser.Waterproof, can be used in the shower. Extra quiet design. Rechargeable, no batteries needed. Ideal for small bathrooms and travel.The Waterpik Water Flosser is clinically proven to be more effective than traditional dental floss and Sonicare Air Floss for reducing plaque and gingivitis.