Lightweight, cordless and easy to use, the Waterpik® ultra cordless dental water jet makes it easy to maintain healthier gums. And for people with braces, the Waterpik Ultra series of dental water jet with the Orthodontic Tip is proven three times more effective at reducing plaque.Push-button dual pressure control system with low for sensitive gums, high for deep cleaning,Reservoir can be filled without removal,Convenient, recharging power supply,No batteries needed. Stays charged for approximately one week Easy to store when not in use